Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
chieu sang » chieu sach, chieu xanh, nhieu tang
chau quang » chat quang, chu quang, thau quang
hieu lang » hieu quang, nhieu tang, hieu van
chau dung » chan dung, chau hung, cau duong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) OR (hieu lang)) - thanh thuong ((chau dung) or (chau quang)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (hieu lang)) - thanh thuong ((chau dung) OR (chau quang)) cong tac than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu sang) OR (hieu lang)) - thanh thuong ((chau dung) or (chau quang)) cong tac than cau".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) OR (hieu lang)) - thanh thuong ((chau dung) or (chau quang)) cong tac than cau*.