Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
cua hang » cua dang, cua nhung, cua ban
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((canh tranh) OR (hanh trinh)) ((cua hang) OR (cua cong)) cong dan than cap~.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((canh tranh) or (hanh trinh)) ((cua hang) or (cua cong)) cong dan than cap*.