Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
chieu sang » chieu sach, chieu xanh, hieu lang
thuong cua » huong cua, thong cua, truong cua
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
hach toan » thanh toan, manh toan
cua dung » cua dang, cua dong, qua dung
tac toan » tap toan, tam toan, tich toan

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 - thanh thuong cua dung cong ((tac toan) OR (hach toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh thuong cua dung cong ((tac toan) or (hach toan)) cau*.