Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tran hoang » tran hong, tran quang, tranh hang
quan hoang » luan hoan
doi chieu » doc hieu, doi chi, mot chieu
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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