Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh manh » hanh mang, lanh manh, hoang manh
hang nong » thang long, han tong
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
lan anh » van anh, tuan anh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - ((hanh manh) or (lan anh)) va ((nhung cong) or (hang nong)) tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - ((hanh manh) OR (lan anh)) va ((nhung cong) OR (hang nong)) tac toan ban.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((hanh manh) or (lan anh)) va ((nhung cong) or (hang nong)) tac toan ban*.