Keywords are inclusive, so the more keywords you put in, the less lines you'll find.
You can specifically ask for a keyword to not exist by prefixing it with !.
For example, searching for "mouse !cheese milk" would find lines that contain both mouse and milk but not cheese.

[060112 01:13] 3ae2c, *Diamond Soul : ((*peeks* dear lord how long has it been since i've been in here...?))

[060112 01:19] f70d6, *Venessa: ((*snickers* hehe))

[060112 01:24] f70d6, *Venessa: this is almost like going back into the VK... well not that far back.... *feels old now.. ok three years.. shhh*

[060112 01:28] 3ae2c, *Diamond Soul : ((hey don't get me started on feeling old))

[060112 01:31] f70d6, *Venessa: lol... well I rped longer then you though... I miss those days... I used to be a good rp.. no more creativity

[060112 02:59] 3ae2c, *Diamond Soul : this is true...Hey! You're still a good rper!

[060112 11:22] 13a93, Kalogero Avera: ((*looks around*))

[060114 23:37] 973d0, Pandora: *peeks in*

[060114 23:37] 973d0, Pandora: *leaves lots of hugs for Greg and Jodie and Kal*

[060114 23:40] 973d0, Pandora: wow... I remember when the room would have been packed by this time on a Saturday evening... Vchat, Tales of Blood, and now Amarantus... they've all been deserted, or maybe we've all just got real lives now. Oh well, *hugs and kisses and gummi bears to one and all* Miss ya'll