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 cong
nong dan » cong dan, nong san, nguong dan
cong san » cong tac
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 ban)) ((nong dan) or (cong san)) ba tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh manh ((cua dang) OR (cua ban)) ((nong dan) OR (cong san)) ba tu.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh manh ((cua dang) or (cua ban)) ((nong dan) or (cong san)) ba tu*.