Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
chieu quang » hieu quang, thieu quang, chu quang
thuong vat » thuong va, thuong viet, thuong nhat
cong thanh » dong thanh, cong trinh, truong thanh
tran xuan » tran quang, tran van
ho chieu » theo chieu, hoc thieu, mot chieu
vat dung » van dung, va dung, viet dung
cong tan » cong tac, cong san, cong ty

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 quang - thanh thuong vat dung ((cong tan) OR (cong thanh)) tran xuan~.
• Adding a wildcard symbol may retrieve word variants: ho chieu quang - thanh thuong vat dung ((cong tan) or (cong thanh)) tran xuan*.