Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
van thanh » ban thanh, van tuan
hoc hieu » hoc thieu, hoc hien, doc hieu
tranh va » tranh van, trang va, trinh va
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, manh toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - canh tranh va nhung cong ((dan toan) or (((van toan) or (van thanh)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh tranh va nhung cong ((dan toan) OR (((van toan) OR (van thanh)))) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh tranh va nhung cong ((dan toan) or (((van toan) or (van thanh)))) cau*.