Manually retrieve entries from SearchWP Related

functions.php

<?php

/*
 * Programmatically find Related content from SearchWP Related
 */

// Instantiate SearchWP Related
$searchwp_related = new SearchWP_Related();

// Use the keywords as defined in the SearchWP Related meta box
$keywords = get_post_meta( get_the_ID(), $searchwp_related->meta_key, true );

$args = array(
  's'              => $keywords,  // The stored keywords to use
  'engine'         => 'default',  // the SearchWP engine to use
  'posts_per_page' => 3,          // how many entries to find
);

// Retrieve Related content for the current post
$related_content = $searchwp_related->get( $args );

// Returns an array of Post objects for you to loop through
print_r( $related_content );