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.

[050307 03:22] 54a1b, Tamarack X: *stomps through the lobby and into the bar*

[050307 03:23] 54a1b, Tamarack X: *lights a thin cigar and steals a bottle of gin.. looking around the empty room, grinning*

[050307 03:24] 54a1b, Tamarack X: good to know all things come to ruin.. sometimes, even I doubt the fatality of it all

[050307 03:25] 54a1b, Tamarack X: *kicks over a nearby wastecan and stomps slowly around the room, blowing smoke over his head and guzzling the occasional gulp from the bottle*

[050307 03:25] 54a1b, Tamarack X: *kicks over a nearby wastecan and stomps slowly around the room, blowing smoke over his head and guzzling the occasional gulp from the bottle*

[050307 03:32] 54a1b, Tamarack X: fuckers... *runs his hand against an empty section of wall*... perfect

[050307 03:33] 54a1b, Tamarack X: *pulls a small blowtorch from under his jacket and stands on a table.. burning a giant circle-A into the wall*...

[050307 03:34] 54a1b, Tamarack X: *hops down and admires his handywork... throws the gin bottle at the anarch symbol. it smashes and sprays*... hehehe

[050307 03:34] 54a1b, Tamarack X: *chews on his cigar and licks the gin spray from his fingers*.. whose town now? WHOSE FUCKIN TOWN NOW?!

[050307 03:35] 54a1b, Tamarack X: *stomps slowly from the bar, out of the hotel and into the cool, cloudy New York night*

[050307 03:35] 54a1b, Tamarack X: *GONE*