Consolidate multiple tags for same thing

Can we please consolidate some of the tags. Every time I have to block a tag that has more then one word I have to block it twice once with a "-" and once with a "_"

For example today I decided to block Five nights at freddy's art, and here are the tags I had to block.

five_nights_at_freddys
five-nights-at-freddys
five-nights-at-freddys-
five-nights-at-freddys-2
five-nights-at-freddys-2-
fnaf
fnaf2
fnaf-2
fnaf3
fnaf4

Am I wrong in thinking that those should be 6 tags at most?