Oral cancer in dog

My 8 year old cairn terrier has just been diagnosed with a very fast growing malanoma cancer in the front of her gum, prognosis removing top jaw part way, chemo and radiation, the research so far is not very favorable tho, dog will be miserable and suffer, with not much of a projected length to her life.
What could I try treating her with specifically to possibly treat this? Any help would be so greatly appreciated, it is growing rapidly