Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
chong cao » thong cao, cong cao, chong chay
van nhanh » van thanh, van hanh, van khanh
nhanh cau » nhanh cay, thanh chau, nhanh ha
chong co » cong co, thong co, khong co
han cong » phan cong, hang cong, hanh cong
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - nhanh ((chong cao) or (chong co)) han cong van nhanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - nhanh ((chong cao) OR (chong co)) han cong van nhanh cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - nhanh ((chong cao) or (chong co)) han cong van nhanh cau*.