negating sound

Hello sound junkies! (Sign my shirt? I wanna grow up to be just like you…)

This is my first day playing with not only Audacity, but audio in general, and so far I love Audacity. However, with the full awarness of my newbie-ness, I apoligize if I’m asking a stupid question:

I’ve tried to use the vocal remover to get rid of the singer on my track, but it doesnt see to recognize the area I want removed as well as the vocoder can. Is there a way to combine the track I’ve used the vocoder on with an original so that area is negated insteat of added?