Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
bien tinh » bi tinh, yen tinh, diep tinh
cuong tap » luong tap, luong tai, cong tan
dung cay » dung cac, dung may, dung cam
cay hung » cam hung, cay rung, cay hong
cong tac » cong ty
doan tai » toan tai, doan thi, doan hai
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 - thanh dung cay hung ((cuong tap) or (cong tac)) ((doan tai) OR (doanh tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - thanh dung cay hung ((cuong tap) OR (cong tac)) ((doan tai) OR (doanh tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so bien tinh - thanh dung cay hung ((cuong tap) or (cong tac)) ((doan tai) OR (doanh tai))".
• Adding a wildcard symbol may retrieve word variants: so bien tinh - thanh dung cay hung ((cuong tap) or (cong tac)) ((doan tai) OR (doanh tai))*.