Perhaps you should try some spelling variations:
khong cang » thong cong, hong bang, khong dung
bien tinh » bi tinh, yen tinh, diep tinh
tranh cua » doanh cua, manh cua
cua khong » hua khong, cua phuong, cua thuong
danh toan » manh toan, anh toan, dang toan
dan toan » van toan, dan than, manh toan
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 - canh tranh cua khong cang ((danh toan) or (dan toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - canh tranh cua khong cang ((danh toan) OR (dan toan)) cau.
• Adding a wildcard symbol may retrieve word variants: so bien tinh - canh tranh cua khong cang ((danh toan) or (dan toan)) cau*.