Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
thay trong » thay tuong, cay trong, pham trong
tung thay » thuong thay, tuong tham, nhung thay
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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

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