Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trong dan » trong dang, trong san, trong tan
chu xanh » chu manh, chua xang, chuc danh
van dung » van dong, xay dung, tin dung
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
va dung » va duong, vat dung, va ung

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 ((chu xanh) OR (chieu xanh)) - nhanh quang ((va dung) OR (van dung)) trong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) OR (chieu xanh)) - nhanh quang ((va dung) or (van dung)) trong dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) OR (chieu xanh)) - nhanh quang ((va dung) or (van dung)) trong dan toan cao*.