Perhaps you should try some spelling variations:
dung doanh » dung dan, dung dong
bien tinh » bi tinh, yen tinh, diep tinh
hanh mang » nhanh mang, hanh trang, nhanh lang
bang cong » dang cong, bang song, hang cong
dung toan » dung thang, dung thanh, dung tai
mang cua » manh cua, dung cua, ban cua
cua bang » chua bang, cua ban, cua dang
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 - hanh mang cua bang cong ((dung toan) or (dung doanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - hanh mang cua bang cong ((dung toan) OR (dung doanh)) cao.
• Adding a wildcard symbol may retrieve word variants: so bien tinh - hanh mang cua bang cong ((dung toan) or (dung doanh)) cao*.