Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh cua » doanh cua, manh cua
cua trong » cua truong, cua trung, qua trong
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan tai
toan ban » van ban

You may be able to get more results by adjusting your search query.

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