Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
trong chuan » thong chuan, trong chan, trong thuan
chieu sang » chieu sach, chieu xanh, hieu lang
chuan dong » chua dong, chuan long, chuyen dong
doi chieu » doc hieu, doi chi, ho chieu
dong cong » duong cong, dung cong, dang cong
cong ban » cong bang, cong san, cong tan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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 sang - thanh trong chuan dong cong ban ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trong chuan dong cong ban ((than cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trong chuan dong cong ban ((than cau) or (than cap))*.