Is there anyway to override the insert keyword function in AdCenter.

In Yahoo I could manually override the displayed keyword.

Because of the limited matching in Adcenter, I need to setup various phrases like:
red widget
redwidget
red widgets
redwidgets
red widjet
redwidjet
red widjets
redwidjets
...
...
...
widget red
widgetred
...
etc.

I want the actual ad to display "red widget' for all the cases.