fix: or instead of and for filter search query

src/structures/structures.service.ts

@@ -23,7 +23,7 @@ export class StructuresService {
     } else {
       query = [{ $text: { $search: searchString } }];
     }
-    return this.structureModel.find({ $and: query }).exec();
+    return this.structureModel.find({ $or: query }).exec();
   }
 
   /**