Exclude specifi page(s) from WordPress search results

shut.php

<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

function chut_search_filter( $query ) {
  if ( ! $query->is_admin && $query->is_search && $query->is_main_query() ) {
    $query->set( 'post__not_in', array( 1,10,110 ) );
  }
}
add_action( 'pre_get_posts', 'chut_search_filter' );