Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
chieu sang » chieu sach, chieu xanh, hieu lang
cua truong » cua trung, xuan truong, xa truong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van 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: ho chieu sang - thanh thuong ((cua truong) OR (cac truong)) cong tac toan ban~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh thuong ((cua truong) or (cac truong)) cong tac toan ban*.