Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tran nhung » tranh nhung, tren nhung, trinh nhung
doi chieu » doc hieu, doi chi, mot chieu
tran hung » tran hong, tran quang, tran hoang
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - nhanh quang ((tran nhung) OR (tran hung)) cong manh toan cao~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - nhanh quang ((tran nhung) or (tran hung)) cong manh toan cao*.