For one the junkfilter isn't very good. Two: Vary your searches. Three: You can add and remove keywords from the keywordfilter as you like, meaning if you put totally in there, and then you want something that says totally then just remove it, until you found what you were looking for, then add it again.

Seriously, it's all we have at the moment. I have been nagging the programmers with no luck. People have tried to make a fix, no luck either.

You could register at Limewire.org and nag them yourself BTW

Vote for it here as well https://www.limewire.org/jira/browse/GUI-29

"new" is such a common word, maybe you should just look for math and instead use the get more results a few times. Also search under documents if you really mean math