The natural treatment for cancer is extremely complicated, and requires a lot of discipline and courage. Herbs won't cure it; it would be a combination of cleansing, nutrients, diet, herbs, etc. If you're seriously considering this, your first stop should be the bookstore, the next a naturopath or two or three and a couple of holistic nutritionists. You might try starting by contacting the Ann Wigmore Institute in Florida.
There is a forum on MedHelp for complementary medicine that may be more helpful to you.
I would talk to your oncologist before you begin taking anything because some natural supplements can interfere with chemo drugs.
Ask your oncologist. Herbs will not cure.