Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
thang long » thanh cong
bien tinh » bi tinh, yen tinh, diep tinh
manh toan » thanh toan, anh tuan, tinh toan
toan ban » van ban
so bien » mot bien
tung va » trung va, tuong va, dung va

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 tung va ((nhung cong) or (thang long)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - thanh tung va ((nhung cong) OR (thang long)) manh toan ban.
• Adding a wildcard symbol may retrieve word variants: so bien tinh - thanh tung va ((nhung cong) or (thang long)) manh toan ban*.