Hi I want to ask which food have to take in 6.5 uric acid, I am breast cancer survivor. Thanx?

Uric acid diet. Tart cherry juice is effective; avoid organ meats; fatty meats and alcohol will elevate uric acid. Avoid these. Also, drink at least 3 liters fluid per day - this may enhance uric acid excretion - and if you incline diet successfully to mostly whole grain, fruit, and veggies, and nuts, using white fish and egg white for protein, then uric acid levels will come down.
See detail. A serum uric acid of 6.5 mg/dl is minimally elevated. Ignore it. Diet has virtually no benefit in lowering the uric acid level despite what other doctors may say.
Avoid purines. Look up low purine diet. Some seafood- lobster etc can precipitate gout as can some diuretic medications-hydrochlorthiazides.