Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
canh trinh » canh tranh, canh tinh, anh trinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
cong doan » cong hoan, dong doanh, cong san
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
va hang » van hang, va nang, va lang

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 - ((canh trinh) or (hanh trinh)) va hang ((cong doan) OR (cong dan)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((canh trinh) OR (hanh trinh)) va hang ((cong doan) OR (cong dan)) phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((canh trinh) or (hanh trinh)) va hang ((cong doan) OR (cong dan)) phan tu".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((canh trinh) or (hanh trinh)) va hang ((cong doan) OR (cong dan)) phan tu*.