Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
canh tran » canh tranh, hanh trang, banh trang
van phung » van phong, van hung, van chuong
doc hieu » toc thieu, hoc thieu, hoc hien
tran van » luan van
cong dan » cong san, cong tan, cong dong
toan tap » toan ban
toan cao » toan 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 manh - canh tran van phung ((cong dan) or (huong dan)) ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - canh tran van phung ((cong dan) OR (huong dan)) ((toan tap) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - canh tran van phung ((cong dan) or (huong dan)) ((toan tap) or (toan cao))*.