Perhaps you should try some spelling variations:
thanh tung » thanh cong
hanh trang » thanh trung, canh tranh, hanh trinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
cua dang » cua cong, cua ban
cong dan » cong tan, huong dan, cong dong
cong san » cong tac

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 - ((thanh tung) or (hanh trang)) cua dang ((cong dan) OR (cong san)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((thanh tung) OR (hanh trang)) cua dang ((cong dan) OR (cong san)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((thanh tung) or (hanh trang)) cua dang ((cong dan) OR (cong san)) van ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((thanh tung) or (hanh trang)) cua dang ((cong dan) OR (cong san)) van ban*.