Does anybody know suppliment work for cancer?

Hi, My father who lives oversea has been diagnosed stage four lung cancer a few weeks ago. The cancer already spread to his spine,liver and brain(a few milimeter) and we were told he has 6 months to live.  I went back to my country this summer and I knew he was complaining about back pain. I regret so bad why I didn't pay more attention to his weight loss and not spending more time with him. I am still in shock and feel useless being so far away from him and not to be able to do anything but pray. 

He just had a first chemo theraphy. He has a good spirit and willing to fight. I don't think the treatment in my country isn't advance comparing to the treatment in the United States. He's been doing research and asked me if I could get any information about "Flower essence  Doctors set". He read the article about it and willing to try even though his doctors don't think it's worth trying.

I appreciate any information about this. I want to do anything for him but all I can do for him right now is to get the information he needs.