Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nhanh mang » nhanh lang, hanh mang, nhanh quang
cong quang » luong quang, thong quang, duong quang
cong vang » cong lang, cong ngang, cong san
va thong » va thuong, va phuong, he thong
toan cau » toan cao, toan ban, toan tap
mang va » mang vua, hang va, bang va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (chieu sach)) - nhanh mang va thong ((cong vang) OR (cong quang)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sach)) - nhanh mang va thong ((cong vang) OR (cong quang)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sach)) - nhanh mang va thong ((cong vang) OR (cong quang)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sach)) - nhanh mang va thong ((cong vang) OR (cong quang)) toan cau*.