Perhaps you should try some spelling variations:
nhanh lang » nhanh quang, nhanh thang, nhan dang
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
hanh mang » nhanh mang, hanh trang, thanh hang
trong dan » trong dang, trong san, trong tan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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: doi chieu sang - ((hanh mang) OR (nhanh lang)) ung dung trong dan ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((hanh mang) or (nhanh lang)) ung dung trong dan ((toan cau) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((hanh mang) or (nhanh lang)) ung dung trong dan ((toan cau) OR (toan tap))*.