khai cuoc qua kho chac chan anh em khong the hoc het duoc ma lai cu co hoc thi hong het theo toi chi can hoc de biet het cac the roi vao tran ung chien bien hoa theo y cua minh thi moi hay duoc chu di theo sach chi thang duoc nguoi ta lan dau thoi voi lai gap nguoi choi trung cuoc hay thi cung kho thang lam