Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
chieu sang » chieu sach, chieu xanh, hieu lang
hieu xanh » chieu xanh, hieu manh, hieu nganh
dang cong » dung cong
cua dang » cua cong, cua ban
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

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