Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
duong manh » duong van
doi chieu » doc hieu, doi chi, ho chieu
cach dung » sach dung, cach mang, tac dung
cua thong » cua thuong, cua khong, cua tong
dung cua » dung luan, dung cho
luong va » dung va
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - cach dung cua thong ((((duong manh) or (luong va))) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - cach dung cua thong ((((duong manh) OR (luong va))) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - cach dung cua thong ((((duong manh) or (luong va))) or (cong tac)) toan cau*.