Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
manh tung » manh hung, thanh tung
trong dan » trong dang, trong san, trong tan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
ap dung » van dung

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: ho ((chieu sach) OR (chieu sang)) - manh tung ((ap dung) OR (xay dung)) trong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - manh tung ((ap dung) OR (xay dung)) trong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - manh tung ((ap dung) OR (xay dung)) trong dan toan cau*.