Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
canh manh » lanh manh, canh tranh, cach mang
doc hieu » toc thieu, hoc thieu, hoc hien
cua dang » cua ban
nong dan » nong san, nguong dan, huong dan
cong dan » cong san, cong tan, huong dan
ba tu » ban tu, ba thu, bac tu

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