Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh hoach » thanh hoa, thach hoanh, thanh hoai
thanh hoang » thanh cong, thanh hoa, thanh toan
hieu lang » chieu sang, hieu quang, nhieu tang
trung qua » trung quan, trong qua, trung cua
dung cong » dung trong
hoi hieu » hoi phieu, hoi tieu, moi hieu
qua dung » quang dung, su dung, qua song
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - thanh trung qua dung cong tan ((thanh hoach) or (thanh hoang))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - thanh trung qua dung cong tan ((thanh hoach) OR (thanh hoang)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - thanh trung qua dung cong tan ((thanh hoach) or (thanh hoang))*.