Perhaps you should try some spelling variations:
quang thanh » quan thanh, hoang thanh, muong thanh
phung cong » nhung cong, phong cong, nhung chong
bien tinh » bi tinh, yen tinh, diep tinh
cong tac » cong ty
tac tuan » tac quan, ta tuan, tai tuan
tuan cap » than cap, thuan cam, toan cao
so bien » mot bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: so bien tinh - than ((quang thanh) or (quan luan)) phung cong tac tuan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - than ((quang thanh) OR (quan luan)) phung cong tac tuan cap*.