Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
luan trung » xuan trung, tuan trung, quang trung
trung cong » truong cong, trong cong, trung uong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dung » thanh dung, anh dung, hanh dong
bac thanh » ban thanh, cac thanh, tai thanh
cong bac » cong tac, dong bac, cong cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) or (chieu sach)) - hanh dung luan trung cong bac thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (chieu sach)) - hanh dung luan trung cong bac thanh san.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (chieu sach)) - hanh dung luan trung cong bac thanh san*.