Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
quang tran » quang tuan, quang trung, quang thanh
tran nhung » tranh nhung, tran hung, tren nhung
nhung cong » dung cong, thong cong, hang cong
anh quang » anh xquang, anh quan, nhanh quang
bai toan » bai tap
tap doan » tap quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: mot chieu sach - anh quang tran nhung cong ((bai toan) or (tap doan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mot chieu sach - anh quang tran nhung cong ((bai toan) OR (tap doan)) cao.
• Adding a wildcard symbol may retrieve word variants: mot chieu sach - anh quang tran nhung cong ((bai toan) or (tap doan)) cao*.