Hello Simon,
Thanks for writing in!
Be advised that what you are trying to accomplish requires a template customization, we would highly to suggest that you use a child theme. This allows you to make code changes that won’t be overwritten when an X update is released.
Once you have your child theme active and ready, please follow these steps below:
1] Using Notepad or TextEdit or Sublime Text or any text editor, please create a new file in your local machine.
2] Insert the following code into that new file
<?php
// =============================================================================
// VIEWS/GLOBAL/_CONTENT-NONE.PHP
// -----------------------------------------------------------------------------
// Output when no posts or pages are available.
// =============================================================================
?>
<article id="post-0" class="post-0 post type-post status-publish hentry">
<div class="entry-wrap">
<header class="entry-header">
<h1 class="entry-title"><?php _e( 'Nothing to Show Right Now', '__x__' ); ?></h1>
</header>
<div class="entry-content">
<p><?php _e( "It appears whatever you were looking for is no longer here or perhaps wasn't here to begin with. You might want to try starting over from the homepage to see if you can find what you're after from there.", '__x__' ); ?></p>
</div>
</div>
</article> <!-- end #post-0 -->
This is where you change the text contents for the search results when there is no results. Please do not forget to change it.
3] Save the file named as _content-none.php
4] Upload this file to your server in the child theme’s folder wp-content/themes/x-child/framework/views/global/
You will need to create the folders in your child themes because it does not exist yet.
Please let us know how it goes.