Perhaps you should try some spelling variations:
trung thanh » truong thanh
doanh thanh » danh thanh, doanh nhan, dinh thanh
bien tinh » bi tinh, yen tinh, diep tinh
nhan dang » nhan dan, phan dang, tran dang
thanh van » thanh san, thanh toan, thanh phan
dan dung » van dung, tin dung, ap dung
van hang » van khang, van hoang, van thang
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 - doanh thanh ((nhan dang) or (dan dung)) trung thanh van hang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - doanh thanh ((nhan dang) OR (dan dung)) trung thanh van hang.
• Adding a wildcard symbol may retrieve word variants: so bien tinh - doanh thanh ((nhan dang) or (dan dung)) trung thanh van hang*.