Em xin hoi anh Smile, hien tai da co nghien cuu nao ve nhung nguoi co thoi ky cua so 2 tuan - 12 tuan hay chua? Co phu thuoc vao kha nang mien dich cua nguoi do hay khong? Va gia su 1 nguoi co he mien dich kem thi ket qua xn o 2, 3, 4 tuan bang phuong phap combo thi co the tin cay duoc ko? neu duoc thi la bao nhieu %? Em xin cam on.
