Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan tap » phan lap, han tap, pha tap
anh ban » anh bang, anh bai, anh van
ban cua » ban quan

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 - anh ban cua dung ((cong dan) or (cong san)) phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - anh ban cua dung ((cong dan) OR (cong san)) phan tap.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - anh ban cua dung ((cong dan) or (cong san)) phan tap*.