Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
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 - hanh trang cua nhung ((cong dan) OR (cong san)) ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trang cua nhung ((cong dan) OR (cong san)) ((toan ban) OR (van ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh trang cua nhung ((cong dan) OR (cong san)) ((toan ban) or (van ban))*".