$meta_query = array( 'relation' => 'OR', array( array( 'key' => 'street', 'value' => '$search', 'compare' => 'LIKE', ), array( 'key' => 'house_no', 'value' => '$search', 'compare' => 'LIKE', ), ), array( 'key' => 'country', 'value' => '$search', 'compare' => 'LIKE', ), );