Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (hieu lang)) - canh tranh cua dung cong dan ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (hieu lang)) - canh tranh cua dung cong dan ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (hieu lang)) - canh tranh cua dung cong dan ((toan cau) or (toan tap))*.