Change the number of accepted search terms for a specific SearchWP supplemental engine

gistfile1.php

<?php

function my_searchwp_max_search_terms_my_engine( $num_terms) {
	return 10; // allow 10 search terms for 'My Engine'
}

add_filter( 'searchwp_max_search_terms_my_engine', 'my_searchwp_max_search_terms_my_engine' );