Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
trung cam » trung tam, trung cap, trung nam
thanh cac » hanh cac, thanh bac, thanh ca
cam hung » cac chung, cam nang, van hung
cong ban » cong bang, cong tan, cong dan
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) OR (chieu sach)) - thanh trung cam hung ((cong ban) or (cong san)) thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu sach)) - thanh trung cam hung ((cong ban) OR (cong san)) thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (chieu sach)) - thanh trung cam hung ((cong ban) or (cong san)) thanh cac".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (chieu sach)) - thanh trung cam hung ((cong ban) or (cong san)) thanh cac*.