Perhaps you should try some spelling variations:
hanh dung » thanh dung, anh dung, hanh dong
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
van thanh » ban thanh, van tuan
thanh cau » thanh chau, thanh mau, nhanh cau
thi lan » thi hanh, thi nang, thi lien

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) or (thi lan)) - hanh dung luan ((hang cong) or (dang cong)) van thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (thi lan)) - hanh dung luan ((hang cong) OR (dang cong)) van thanh cau.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (thi lan)) - hanh dung luan ((hang cong) or (dang cong)) van thanh cau*.