Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trang » canh tranh, hanh trang, banh trang
hoc chieu » hoc thieu, ho chieu, hoc hien
hang cong » dang cong, hang nong, bang cong
trang va » tran van, hang va
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu
toan cau » toan cao, toan ban, toan tap
va hang » van hang, va nang, va lang

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 trang va hang cong tan ((phan cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - canh trang va hang cong tan ((phan cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - canh trang va hang cong tan ((phan cau) or (toan cau))*.