Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
hang cong » dang cong, hang nong, bang cong
ban thanh » ban hanh, ban hang
thanh cap » thanh lap, hanh cap, than cap
cong ban » cong bang, cong san, cong tan

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) or (hieu lang)) - hanh ((trung cua) or (trung cap)) hang cong ban thanh cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu lang)) - hanh ((trung cua) OR (trung cap)) hang cong ban thanh cap.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu lang)) - hanh ((trung cua) or (trung cap)) hang cong ban thanh cap*.