Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
nhan dong » nhanh dong, nhan dang, phan dong
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
dong cua » dung cua, cong cua, huong cua
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan

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 - nhan dong cua dung cong dan ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - nhan dong cua dung cong dan ((toan ban) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - nhan dong cua dung cong dan ((toan ban) or (van ban))*.