Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
hieu lang » chieu sang, hieu quang, nhieu tang
trung hay » trung ha, trung hai, trung gay
dung cong » dung trong
hay dung » xay dung, gay dung, hai dung
cong tan » cong tac, cong san, cong thanh
tran ban » tranh ban, tran van, toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (((chinh sach) or (chiet tach)))) - thanh trung hay dung cong tan tran ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (((chinh sach) OR (chiet tach)))) - thanh trung hay dung cong tan tran ban.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (((chinh sach) or (chiet tach)))) - thanh trung hay dung cong tan tran ban*.