Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
cong tac » cong ty
than cau » toan cau, phan cau, than cap
toan ban » van ban
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - canh trinh va dung cong tac ((than cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - canh trinh va dung cong tac ((than cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - canh trinh va dung cong tac ((than cau) or (toan ban))*.