Perhaps you should try some spelling variations:
thanh tong » thanh cong, thanh tung, thanh long
nhung cong » dung cong, thong cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
tong quan » thong quan, tong luan, luong quan
hang cong » dang cong, hang nong, bang cong
toan hanh » toan thanh, toan anh, tran hanh
hanh cap » hanh cac, hanh cat, hanh cad
ho hieu » ho chieu, hoi hieu, nho hieu

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 - thanh tong quan ((nhung cong) or (hang cong)) toan hanh cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh tong quan ((nhung cong) OR (hang cong)) toan hanh cap*.