Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
cong lang » cong vang, cong luong, cong quang
lang than » lang thang, lang thanh, sang than
ho chieu » theo chieu, hoc thieu, doi chieu
trung ha » trung hoc, trung cap
than cau » toan cau, phan cau, than cap

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 ((trung tam) or (trung ha)) nhung cong lang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung tam) OR (trung ha)) nhung cong lang than cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung tam) or (trung ha)) nhung cong lang than cau*.