Perhaps you should try some spelling variations:
chiet tach » chieu sach
trinh xuat » trinh luat, trinh xuan, trinh xay
trich xuat » trinh luat, trinh xuan
ho chiet » ho chieu, ho thiet, hoc thiet
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh ((trinh xuat) OR (trich xuat)) trong cong tap toan tap~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh ((trinh xuat) OR (trich xuat)) trong cong tap toan tap*.