Suggestions

[Dark Ultima]

Could you make it so you get less results when you look up, for example, "mario" and "bros" instead of more?

Do you mean you want the query to only return results in which both words are found, opposed to results in which either word is found?

Should be easy to do, just alittle bit of javascript to format the user input into a query statement. I can think of how to do it off the top of my head, but I can't think of the exact code off the top of my head.

Edit: Looking at it, it does everything people want, it just doesn't tell anyone how to use it the way they want to. It also appears that you can't make a phrase mandatory, which can be replaced by making each individual word mandatory, except it won't search for the exact order of the words desired.

I also noticed an inconsistency: searching for [+Super +Mario] should should make both words mandatory (and as such, get fewer results than [Super +Mario] or [+Super Mario]) it returns Mario Pinball Land, which lacks the word Super. Not sure why.

I don't know whether I'm being helpful or annoying, but thats my minor observation based on the previous two suggestions.