Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » hanh chinh
nhung cong » dung cong, thong cong, hang cong
cong quang » luong quang, thong quang, duong quang
quang phan » quang chan, quang phat, quang thanh
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (chieu sach)) - ((hanh trinh) OR (canh tranh)) va nhung cong quang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - ((hanh trinh) OR (canh tranh)) va nhung cong quang phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sach)) - ((hanh trinh) OR (canh tranh)) va nhung cong quang phan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - ((hanh trinh) OR (canh tranh)) va nhung cong quang phan cau*.