Index: branches/5.2.x/core/kernel/db/cat_event_handler.php
===================================================================
--- branches/5.2.x/core/kernel/db/cat_event_handler.php
+++ branches/5.2.x/core/kernel/db/cat_event_handler.php
@@ -1318,10 +1318,14 @@
 				$revelance_parts[] = 'IF('.$field.' REGEXP "[[:<:]]('.$keyword.')[[:>:]]", '.$weight.', 0)';
 			}*/
 
+			if ( count($positive_words) > 1 ) {
+				$condition = $field . ' LIKE "%' . implode(' ', $positive_words) . '%"';
+				$revelance_parts[] = 'IF(' . $condition . ', ' . $weight_sum . ', 0)';
+			}
+
 			// search by partial word matches too
-			$revelance_parts[] = 'IF('.$field.' LIKE "%'.implode(' ', $positive_words).'%", '.$weight_sum.', 0)';
-			foreach ($positive_words as $keyword) {
-				$revelance_parts[] = 'IF('.$field.' LIKE "%'.$keyword.'%", '.$weight.', 0)';
+			foreach ( $positive_words as $keyword ) {
+				$revelance_parts[] = 'IF(' . $field . ' LIKE "%' . $keyword . '%", ' . $weight . ', 0)';
 			}
 		}
 
Index: branches/5.2.x/core/units/categories/categories_event_handler.php
===================================================================
--- branches/5.2.x/core/units/categories/categories_event_handler.php
+++ branches/5.2.x/core/units/categories/categories_event_handler.php
@@ -2661,10 +2661,14 @@
 					$revelance_parts[] = 'IF('.$field.' REGEXP "[[:<:]]('.$keyword.')[[:>:]]", '.$weight.', 0)';
 				}*/
 
+				if ( count($positive_words) > 1 ) {
+					$condition = $field . ' LIKE "%' . implode(' ', $positive_words) . '%"';
+					$revelance_parts[] = 'IF(' . $condition . ', ' . $weight_sum . ', 0)';
+				}
+
 				// search by partial word matches too
-				$revelance_parts[] = 'IF('.$field.' LIKE "%'.implode(' ', $positive_words).'%", '.$weight_sum.', 0)';
-				foreach ($positive_words as $keyword) {
-					$revelance_parts[] = 'IF('.$field.' LIKE "%'.$keyword.'%", '.$weight.', 0)';
+				foreach ( $positive_words as $keyword ) {
+					$revelance_parts[] = 'IF(' . $field . ' LIKE "%' . $keyword . '%", ' . $weight . ', 0)';
 				}
 			}