Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
thanh tung » thanh cong
bien tinh » bi tinh, yen tinh, diep tinh
cua thong » cua thuong, cua khong, cua tong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan cao » toan ban, toan tap
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) or (thanh tung)) cua thong cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - ((canh tranh) OR (thanh tung)) cua thong cong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: so bien tinh - ((canh tranh) or (thanh tung)) cua thong cong manh toan cao*.