Trying to fix search query

@@ -1010,11 +1010,10 @@ class Actions {
 				)
 				AND ((uml.meta_value LIKE '%$username%'
 					OR umf.meta_value LIKE '%$username%'
-					OR umm.meta_value LIKE '%$username%')
+					OR (STRCMP(umm.meta_value, '') != 0 AND umm.meta_value LIKE '%$username%'))
 					AND ums.meta_value != 'terminated'
 				)
 				ORDER BY first_name, last_name";
-
 			$result = $wpdb->get_results($query, ARRAY_A);
 
 			if (! empty($result)) {