[kh99]

It looks like in packages\vbdbsearch\coresearchcontroller.php around line 157 is this:

$threads = $vbulletin->db->query_read_slave("
	SELECT searchgroup.groupid, MATCH(searchgroup_text.title) AGAINST ('$safetitle') AS score
	FROM " . TABLE_PREFIX . "searchgroup AS searchgroup JOIN " . TABLE_PREFIX . "searchgroup_text AS searchgroup_text ON
		(searchgroup.searchgroupid = searchgroup_text.searchgroupid)
	$hook_query_joins
	WHERE MATCH(searchgroup_text.title) AGAINST ('$safetitle') AND
		searchgroup.contenttypeid = $contenttypeid
		" . ($threadid ? " AND searchgroup.groupid <> $threadid" : "") . "
		$hook_query_where
	HAVING score > 4
	LIMIT 5
");

So maybe if you increased the limit and/or lowered the score you'd get more.