Perhaps you should try some spelling variations:
thanh chung » thanh chuong, thanh hung, thanh phuong
chung chuan » chung khoan, chung cua, chung nhan
chuan khong » chu khong, chuan chon, chuan long
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - thanh chung chuan khong ((cong ty) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh chung chuan khong ((cong ty) OR (cong san)) phan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh chung chuan khong ((cong ty) or (cong san)) phan cau*.