Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
va dang » van dang, va nang, va lang

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

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