Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung nhiem » trung hieu, trung hien, trong nhien
nhiem trong » nghiep trong
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
cong tan » cong tac, cong san, cong thanh
tran ban » tranh ban, tran van, tran bai
toan ban » van ban

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 xanh) OR (chieu sang)) - thanh trung nhiem trong cong tan ((tran ban) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - thanh trung nhiem trong cong tan ((tran ban) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) OR (chieu sang)) - thanh trung nhiem trong cong tan ((tran ban) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) OR (chieu sang)) - thanh trung nhiem trong cong tan ((tran ban) or (toan ban))*.