Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
nhan cua » nhat cua, nhan luc, nhan su
cua dang » cua cong, cua ban
cong dan » cong san, cong tan, huong dan
thi hao » thi thao, thi hai, thi hanh
thi ha » thi hai, thi hanh

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 - doanh nhan cua dang cong dan ((thi hao) or (thi ha))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - doanh nhan cua dang cong dan ((thi hao) OR (thi ha)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - doanh nhan cua dang cong dan ((thi hao) or (thi ha))*.