Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
canh tinh » hanh tinh, manh tinh, canh tranh
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
tinh cua » trinh cua, sinh cua, tinh chat
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh lap, thanh cac
phan cau » phan dau, phan cac, phan 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 tinh cua dung cong dan ((than cap) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh tinh cua dung cong dan ((than cap) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh tinh cua dung cong dan ((than cap) or (phan cau))*.