Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh cua » doanh cua, manh cua
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
hanh tap » han tap, hanh tai, hang tap
hanh cap » hanh cac, hanh cat, hanh cad
han tai » hang tai, nhan tai, van tai

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 tranh cua dung cong dan ((((hanh tap) or (hanh cap))) or (han tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh tranh cua dung cong dan ((((hanh tap) OR (hanh cap))) OR (han tai)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh tranh cua dung cong dan ((((hanh tap) or (hanh cap))) or (han tai))*.