I fixed this.
Open file search.php and after line get_header() add so code:
<?php
/**
* Display custom post type
*/
add_filter( 'pre_get_posts', 'my_get_posts' );
function my_get_posts( $query ) {
if ( is_search() && false == $query->query_vars['suppress_filters'] )
$query->set( 'post_type', array( 'post', 'gallery', 'work' ) ); // Set post types
return $query;
}
/**
* !!! Without lines bellow WP display warnings !!!
*/
global $query_string;
query_posts($query_string); // !!! its very important line !!!
?>
