Giai thich co the day o Thai khi khong co bang dai hoc hay khong va nhung yeu to quyet dinh tinh duoc. Phac thao cac lo trinh thay the, cac yeu cau phap ly thuong gap voi cac vi tri giang day, va thuc te cho nhung nguoi khong co bang. Giup nguoi xem hieu duoc noi nao co ngoai le va nhung giay to hay chung chi bo sung co the can de dang ki co hoi giang day hop phap.
