Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
phan cau » phan dau, phan cac, phan tu
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

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 - ((hanh trinh) OR (canh tranh)) va dung cong dan ((phan cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - ((hanh trinh) OR (canh tranh)) va dung cong dan ((phan cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((hanh trinh) OR (canh tranh)) va dung cong dan ((phan cau) OR (toan cau))*.