Perhaps you should try some spelling variations:
ncanh tranh » nhanh thanh, can tranh, nganh thanh
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
dang cong » dung cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
va dang » van dang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - ((canh tranh) or (ncanh tranh)) va dang cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((canh tranh) OR (ncanh tranh)) va dang cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((canh tranh) or (ncanh tranh)) va dang cong san toan ban*.