Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
cong vang » cong lang, cong quang, cong ngang
vang than » sang than, van than, cang thang
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, 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 va) or (trung ha)) nhung cong vang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung va) OR (trung ha)) nhung cong vang than cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung va) or (trung ha)) nhung cong vang than cau*.