Mother- brain and lung cancer stage 4 from Philippines

Hello, i live in Canada but my mother is living with my 2 sisters in Philippines. Last January of 2012 she was diagnosed with brain ang lung cancer stage 4 inoperable. I hate that her doctor keeps saying negative things instead of keeping our hopes high and to keep fighting no matter what. Once he (doctor) told my sisters that there's nothing they could do. Even if they perform a radiation treatment for my mom nothing is gonna change. Thats when i start looking at the internet and found this site. And surely there is hope, i found people here who survived and keeps fighting. Right now my mom is so weak , she cannot do things on her own, she can't walk, talk and always very sleepy. I feel like her doctor is not doing anything. Please help me...im very confused, coz some people were telling us that radiation theraphy will only worsen her condition, bcoz of that my 2 sisters are scared to do it. But i totally disagree, i know this will help my mother get back to normal.

amron