Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
theo sach » thuoc sach, te sach, theo lich
cap nhung » cam nhung, vap nhung, dap nhung
cong cap » cung cap, cong cau, cong cac
cong san » cong tac
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((theo sach) or (chieu sach)) - thanh cong cap nhung cong san ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (chieu sach)) - thanh cong cap nhung cong san ((than cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (chieu sach)) - thanh cong cap nhung cong san ((than cau) or (than cap))*.