Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
manh trung » manh tung, thanh trung, manh hung
lieu tinh » trieu tinh, diep tinh, bien tinh
nang cong » nang song, dang cong, bang cong
trung va » truong va, trang va, trung ha
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cao » toan cao, thai cao, than cap
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((lieu tinh) or (chieu sach)) - manh trung va nang cong tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((lieu tinh) OR (chieu sach)) - manh trung va nang cong tan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((lieu tinh) or (chieu sach)) - manh trung va nang cong tan than cao*.