Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
anh xquang » anh quan, anh xuan
hong cuong » hong vuong, hung cuong, thong chuong
doi chieu » doc hieu, doi chi, mot chieu
anh quang » anh quan, nhanh quang, tinh quang
tran hong » tran hoang, tran trong, tranh hang
tap doan » tap quan
bai toan » bai 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 - ((anh quang) or (anh xquang)) tran hong cuong ((tap doan) or (bai toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((anh quang) OR (anh xquang)) tran hong cuong ((tap doan) OR (bai toan)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((anh quang) or (anh xquang)) tran hong cuong ((tap doan) or (bai toan)) cau*.