Ovrain or stomac cancer stage 4

My mother is survive with cancer from 2009, and she has now in stage 3 c or 4, doctor said we give the all type of 9 cheemo for this cancer and now cheemo is not working. in stomac fluid building up and doctors drain the fluid 2 or 3 bottle. After 5 or 6 days again the fluid build in stommac. Plsss give me the solution of this i cant lose my mother plsss help me what can i do.???