Perhaps you should try some spelling variations:
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
hoa tuan » hoa thuan, hoa luan, hoa quan
hoa phan » hoa dan, co phan
cong san » cong tac
cong tan » cong tac, cong thanh, cong ty
than cau » toan cau, phan cau, than cap

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 - thanh ((hoa tuan) or (hoa phan)) nhung ((cong san) or (cong tan)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - thanh ((hoa tuan) OR (hoa phan)) nhung ((cong san) OR (cong tan)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - thanh ((hoa tuan) or (hoa phan)) nhung ((cong san) or (cong tan)) than cau*.