Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thang » cang thang, cong thong, cung thang
cong thanh » dong thanh, cong trinh, truong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
trung va » truong va, trang va, trung ha
cong tan » cong tac, cong san, cong ty
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 hieu lang - thanh trung va nhung ((cong tan) or (((cong thang) OR (cong thanh)))) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh trung va nhung ((cong tan) OR (((cong thang) OR (cong thanh)))) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - thanh trung va nhung ((cong tan) or (((cong thang) OR (cong thanh)))) toan ban".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh trung va nhung ((cong tan) or (((cong thang) OR (cong thanh)))) toan ban*.