Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
anh xquang » anh quang, anh xuan
dung cong » dung trong
anh quan » anh tuan, ban quan, anh nhan
tan dung » tran dung, tin dung, van dung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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 sach) or (chinh sach)) - ((anh xquang) or (anh quan)) tan dung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chinh sach)) - ((anh xquang) OR (anh quan)) tan dung cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chinh sach)) - ((anh xquang) or (anh quan)) tan dung cong tan toan cao*.