Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
cua nhung » va nhung
hoi hieu » hoi phieu, hoi tieu, moi hieu
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan tap » 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: hoi hieu lang - ((thanh tung) or (thanh cong)) cua nhung cong van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - ((thanh tung) OR (thanh cong)) cua nhung cong van toan tap.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - ((thanh tung) or (thanh cong)) cua nhung cong van toan tap*.