search.php

<?php

// Main search query
if( have_posts() ): 
	
	while( have_posts() ): the_post();
		get_template_part( 'loop', 'search' );
	endwhile;

// If no results, display random listing
else:

	$args = array(
		'posts_per_page' => 10,
		'orderby' => 'rand',
	);
	$random = new WP_Query( $args );
	if( $random->have_posts() ): 
		echo '<h2>No search results found, but here\'s some posts that might interest you</h2>';

		while( $random->have_posts() ): $random->the_post();
			get_template_part( 'loop', 'search' );
		endwhile; 

	endif;
	wp_reset_query();
	
endif;