chao cac ban,day la lan dau tien toi thiet ke cho minh mot cai rieng biet,neu co gi k thich mong cac ban gop y,toi muon tam su voi cac ban rat nhieu nhung chuyen doi tu cua toi co nhieu chuyen buon va phuc tap lam,de mot tgian nua toi se cung cac ban noi chuyen voi nhau nhieu hon nhe