Hide Search Form above results

You can find the search form in the “search.php” file. Comment out or delete the code that looks like this one:

<header class="page-header">
<h1 class="page-title">
    <?php _e( 'Search results for:', 'twentynineteen' ); ?>
</h1>
<div class="page-description"><?php echo get_search_query(); ?></div>

If you are using a child theme and there is no “search.php” file, then copy the file from the parent theme into the child theme and delete that code. Will be great to have more details, for instance what theme are you using right now.