Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » lieu tinh, chau tinh, kieu tinh
canh trang » canh tranh, hanh trang, banh trang
dung cong » dung trong
cong dung » cuong dung, cong dong, cong luong
dung toan » dung doanh, dung thang, dung thanh
trang va » tran van, hang va
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: hoc ((chieu xanh) or (((chieu tinh) OR (trieu tinh)))) - canh trang va dung cong dung toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (((chieu tinh) OR (trieu tinh)))) - canh trang va dung cong dung toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (((chieu tinh) OR (trieu tinh)))) - canh trang va dung cong dung toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (((chieu tinh) OR (trieu tinh)))) - canh trang va dung cong dung toan cau*.