Perhaps you should try some spelling variations:
thanh hang » thanh hoang, thanh thang, thanh hung
tranh hang » trinh han, tran hoang, tran hong
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
hoi hieu » hoi phieu, hoi tieu, moi hieu
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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 hang) or (tranh hang)) cua dung cong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - ((thanh hang) OR (tranh hang)) cua dung cong dan ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - ((thanh hang) or (tranh hang)) cua dung cong dan ((toan cau) or (toan cao))*.