Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
nhan dong » nhanh dong, nhan dang, phan dong
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
dong cua » dung cua, cong cua, huong cua
cua dang » cua cong, cua ban
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 dang cong dan ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - nhan dong cua dang cong dan ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - nhan dong cua dang cong dan ((toan ban) OR (van ban))*.