well i have vshare 2.6 and now i checked vshare 2.7 and i think it is in the tag.php . And in vshare 2.7 it is solved, i mean there isn't any sorting by relevance...
But i have another question. I changed stuff to have 5 thumbs not 3 but i don't know where can i find the command that deletes thumbs when i want to delete a video... cause now only the first 3 thumbs are deleted...