Sir my fiancy have a blood cancer at third stage what should i do for her treatment .?

Learn more: Please forgive my frankness. "blood cancer" usually means leukemia, and it is not staged. A few leukemias, notably chronic myelogenous leukemia, have phases as they progress. What you must do for your fiancee is find out exactly what she has -- and if your information is accurate; the world is full of deception. Then offer her love-made-visible, being as helpful as you can.