Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
quang tran » quang tuan, quang trung, quang thanh
trong dang » truong dang, trong dan, trong dong
tran dung » tran dang, tran hung, tran quang
thanh van » thanh san, thanh toan, thanh phan
than ban » thanh ban, toan ban, than man

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 (chieu sach)) - tinh quang tran dung trong dang ((than ban) or (thanh van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (chieu sach)) - tinh quang tran dung trong dang ((than ban) OR (thanh van)).
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) or (chieu sach)) - tinh quang tran dung trong dang ((than ban) or (thanh van))*.