diff --git a/changelog.md b/changelog.md
index 8d6cd23..d614263 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 2025-04-22 - 5.12.0 - feat(doc/search)
+Enhance search functionality with filter and validate options for advanced query control
+
+- Added 'filter' option to merge additional MongoDB query constraints in search
+- Introduced 'validate' hook to post-process and filter fetched documents
+- Refactored underlying execQuery function to support additional search options
+- Updated tests to cover new search scenarios and fallback mechanisms
+
 ## 2025-04-22 - 5.11.4 - fix(search)
 Implement implicit AND logic for mixed simple term and field:value queries in search
 
diff --git a/readme.md b/readme.md
index 381a318..185c928 100644
--- a/readme.md
+++ b/readme.md
@@ -225,6 +225,10 @@ await Product.search('TypeScript Aufgabe');
 
 // 7: Empty query returns all documents
 await Product.search('');
+// 8: Scoped search with additional filter (e.g. multi-tenant isolation)
+await Product.search('book', { filter: { ownerId: currentUserId } });
+// 9: Post-search validation hook to drop unwanted results (e.g. price check)
+await Product.search('', { validate: (p) => p.price < 100 });
 ```
 
 The search functionality includes:
diff --git a/test/test.search.ts b/test/test.search.ts
index 936a371..125dbee 100644
--- a/test/test.search.ts
+++ b/test/test.search.ts
@@ -276,6 +276,20 @@ tap.test('should support wildcard plain term with question mark pattern', async
   expect(names).toEqual(['Galaxy S21', 'iPhone 12']);
 });
 
+// Filter and Validation tests
+tap.test('should apply filter option to restrict results', async () => {
+  // search term 'book' across all fields but restrict to Books category
+  const bookFiltered = await Product.search('book', { filter: { category: 'Books' } });
+  expect(bookFiltered.length).toEqual(2);
+  bookFiltered.forEach((p) => expect(p.category).toEqual('Books'));
+});
+tap.test('should apply validate hook to post-filter results', async () => {
+  // return only products with price > 500
+  const expensive = await Product.search('', { validate: (p) => p.price > 500 });
+  expect(expensive.length).toBeGreaterThan(0);
+  expensive.forEach((p) => expect(p.price).toBeGreaterThan(500));
+});
+
 // Close database connection
 tap.test('close database connection', async () => {
   await testDb.mongoDb.dropDatabase();
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 1431345..29adb24 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartdata',
-  version: '5.11.4',
+  version: '5.12.0',
   description: 'An advanced library for NoSQL data organization and manipulation using TypeScript with support for MongoDB, data validation, collections, and custom data types.'
 }
diff --git a/ts/classes.doc.ts b/ts/classes.doc.ts
index 178ade6..abcffbf 100644
--- a/ts/classes.doc.ts
+++ b/ts/classes.doc.ts
@@ -5,6 +5,15 @@ import { SmartdataDbCursor } from './classes.cursor.js';
 import { type IManager, SmartdataCollection } from './classes.collection.js';
 import { SmartdataDbWatcher } from './classes.watcher.js';
 import { SmartdataLuceneAdapter } from './classes.lucene.adapter.js';
+/**
+ * Search options for `.search()`:
+ * - filter: additional MongoDB query to AND-merge
+ * - validate: post-fetch validator, return true to keep a doc
+ */
+export interface SearchOptions<T> {
+  filter?: Record<string, any>;
+  validate?: (doc: T) => Promise<boolean> | boolean;
+}
 
 export type TDocCreation = 'db' | 'new' | 'mixed';
 
@@ -318,15 +327,40 @@ export class SmartDataDbDoc<T extends TImplements, TImplements, TManager extends
     const ctor = this as any;
     return Array.isArray(ctor.searchableFields) ? ctor.searchableFields : [];
   }
+  /**
+   * Execute a query with optional hard filter and post-fetch validation
+   */
+  private static async execQuery<T>(
+    this: plugins.tsclass.typeFest.Class<T>,
+    baseFilter: Record<string, any>,
+    opts?: SearchOptions<T>
+  ): Promise<T[]> {
+    let mongoFilter = baseFilter || {};
+    if (opts?.filter) {
+      mongoFilter = { $and: [mongoFilter, opts.filter] };
+    }
+    let docs: T[] = await (this as any).getInstances(mongoFilter);
+    if (opts?.validate) {
+      const out: T[] = [];
+      for (const d of docs) {
+        if (await opts.validate(d)) out.push(d);
+      }
+      docs = out;
+    }
+    return docs;
+  }
 
   /**
    * Search documents by text or field:value syntax, with safe regex fallback
+   * Supports additional filtering and post-fetch validation via opts
    * @param query A search term or field:value expression
+   * @param opts Optional filter and validate hooks
    * @returns Array of matching documents
    */
   public static async search<T>(
     this: plugins.tsclass.typeFest.Class<T>,
     query: string,
+    opts?: SearchOptions<T>,
   ): Promise<T[]> {
     const searchableFields = (this as any).getSearchableFields();
     if (searchableFields.length === 0) {
@@ -335,7 +369,8 @@ export class SmartDataDbDoc<T extends TImplements, TImplements, TManager extends
     // empty query -> return all
     const q = query.trim();
     if (!q) {
-      return await (this as any).getInstances({});
+      // empty query: fetch all, apply opts
+      return await (this as any).execQuery({}, opts);
     }
     // simple exact field:value (no spaces, no wildcards, no quotes)
     // simple exact field:value (no spaces, wildcards, quotes)
@@ -346,17 +381,17 @@ export class SmartDataDbDoc<T extends TImplements, TImplements, TManager extends
       if (!searchableFields.includes(field)) {
         throw new Error(`Field '${field}' is not searchable for class ${this.name}`);
       }
-      return await (this as any).getInstances({ [field]: value });
+      // simple field:value search
+      return await (this as any).execQuery({ [field]: value }, opts);
     }
     // quoted phrase across all searchable fields: exact match of phrase
     const quoted = q.match(/^"(.+)"$|^'(.+)'$/);
     if (quoted) {
       const phrase = quoted[1] || quoted[2] || '';
-      // build regex that matches the exact phrase (allowing flexible whitespace)
       const parts = phrase.split(/\s+/).map((t) => escapeForRegex(t));
       const pattern = parts.join('\\s+');
       const orConds = searchableFields.map((f) => ({ [f]: { $regex: pattern, $options: 'i' } }));
-      return await (this as any).getInstances({ $or: orConds });
+      return await (this as any).execQuery({ $or: orConds }, opts);
     }
     // wildcard field:value (supports * and ?) -> direct regex on that field
     const wildcardField = q.match(/^(\w+):(.+[*?].*)$/);
@@ -369,7 +404,7 @@ export class SmartDataDbDoc<T extends TImplements, TImplements, TManager extends
       // escape regex special chars except * and ?, then convert wildcards
       const escaped = pattern.replace(/([.+^${}()|[\\]\\])/g, '\\$1');
       const regexPattern = escaped.replace(/\*/g, '.*').replace(/\?/g, '.');
-      return await (this as any).getInstances({ [field]: { $regex: regexPattern, $options: 'i' } });
+      return await (this as any).execQuery({ [field]: { $regex: regexPattern, $options: 'i' } }, opts);
     }
     // wildcard plain term across all fields (supports * and ?)
     if (!q.includes(':') && (q.includes('*') || q.includes('?'))) {
@@ -377,7 +412,7 @@ export class SmartDataDbDoc<T extends TImplements, TImplements, TManager extends
       const escaped = q.replace(/([.+^${}()|[\\]\\])/g, '\\$1');
       const pattern = escaped.replace(/\*/g, '.*').replace(/\?/g, '.');
       const orConds = searchableFields.map((f) => ({ [f]: { $regex: pattern, $options: 'i' } }));
-      return await (this as any).getInstances({ $or: orConds });
+      return await (this as any).execQuery({ $or: orConds }, opts);
     }
     // implicit AND for mixed simple term + field:value queries (no explicit operators)
     const parts = q.split(/\s+/);
@@ -405,13 +440,13 @@ export class SmartDataDbDoc<T extends TImplements, TImplements, TManager extends
           return { $or: ors };
         }
       });
-      return await (this as any).getInstances({ $and: andConds });
+      return await (this as any).execQuery({ $and: andConds }, opts);
     }
     // detect advanced Lucene syntax: field:value, wildcards, boolean, grouping
     const luceneSyntax = /(\w+:[^\s]+)|\*|\?|\bAND\b|\bOR\b|\bNOT\b|\(|\)/;
     if (luceneSyntax.test(q)) {
       const filter = (this as any).createSearchFilter(q);
-      return await (this as any).getInstances(filter);
+      return await (this as any).execQuery(filter, opts);
     }
     // multi-term unquoted -> AND of regex across fields for each term
     const terms = q.split(/\s+/);
@@ -421,12 +456,12 @@ export class SmartDataDbDoc<T extends TImplements, TImplements, TManager extends
         const ors = searchableFields.map((f) => ({ [f]: { $regex: esc, $options: 'i' } }));
         return { $or: ors };
       });
-      return await (this as any).getInstances({ $and: andConds });
+      return await (this as any).execQuery({ $and: andConds }, opts);
     }
     // single term -> regex across all searchable fields
     const esc = escapeForRegex(q);
     const orConds = searchableFields.map((f) => ({ [f]: { $regex: esc, $options: 'i' } }));
-    return await (this as any).getInstances({ $or: orConds });
+    return await (this as any).execQuery({ $or: orConds }, opts);
   }