Perhaps you should try some spelling variations:
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
tinh cua » trinh cua, sinh cua, tinh chat
van toan » van tuan, van tan, van thanh
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh tinh cua ((tong cong) or (cong cong)) van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh tinh cua ((tong cong) OR (cong cong)) van toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh tinh cua ((tong cong) or (cong cong)) van toan tap*.