Change search query in wordpress custom post type

I want to change the query of search a custom post type in wordpress admin panel. I use this method:

function change_admin_search( $query ) {

    $post_type = 'custom_post_type';

    if( ! is_admin() )
        return;

    if ( $query->query['post_type'] != $post_type )
        return;

    $search_term = $query->query_vars['s'];
    $persian = ['۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹'];
    $num = range(0, 9);
    $persianNumbersOnly = str_replace( $num,$persian, $search_term);
    $englishNumbersOnly = str_replace( $persian, $num, $search_term);
    $query->query_vars['s'] = $englishNumbersOnly;
}

add_action( 'pre_get_posts', 'change_admin_search' );

In this query, it search only with $englishNumbersOnly. I want to search with $englishNumbersOnly OR $persianNumbersOnly, and $query->query_vars['s'] have a OR in query. Actually have a query like this :

post Like "%$englishNumbersOnly%" OR post Like "%$persianNumbersOnly%"

Thanks