Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
trang van » tran van, trang va, tang van
trong van » trong cac
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
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 - hanh ((trang van) OR (trong van)) dung ((cong dan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh ((trang van) OR (trong van)) dung ((cong dan) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh ((trang van) OR (trong van)) dung ((cong dan) or (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh ((trang van) OR (trong van)) dung ((cong dan) or (cong san)) toan ban*.