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, cong tac, luong tai
dung cay » dung cac, dung may, dung cam
cay hung » cam hung, cay rung, cay hong
doan tai » doanh tai, toan tai, doan thi
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 ty)) doan 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 ty)) doan tai.
• Adding a wildcard symbol may retrieve word variants: so bien tinh - thanh dung cay hung ((cuong tap) or (cong ty)) doan tai*.