Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tran hoang » tran hong, quan hoang, tran quang
doi chieu » doc hieu, doi chi, mot chieu
tran hung » tran hong, tran quang, tran huu
cuong tac » cong tac, tuong tac, cuong cac
quan cau » quang cao, toan cau, quan ha

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 - nhanh quang ((tran hung) or (tran hoang)) cuong tac quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - nhanh quang ((tran hung) OR (tran hoang)) cuong tac quan cau*.