Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
hanh ban » thanh ban, hang ban, hanh han
hanh san » thanh san, khach san, thanh son
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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: theo ((chieu xanh) OR (chieu sang)) - ((hanh ban) OR (hanh san)) quan dung cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sang)) - ((hanh ban) OR (hanh san)) quan dung cong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - ((hanh ban) OR (hanh san)) quan dung cong dan toan cau*.