/* Add Custom Post Type in Search Page */
function include_cpt_search( $query ) {
	if ( $query->is_search ) {
		$query->set( 'post_type', array( 'post', 'page', 'custom_post_type', 'test-custom-post-typ' ) );
	}
	return $query;
}
add_filter( 'pre_get_posts', 'include_cpt_search' );