Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
manh tuong » manh tung, manh cuong, minh tuong
tranh hang » trinh han, tran hoang, tran hong
doi chieu » doc hieu, doi chi, mot chieu
tran hung » tran hong, tran quang, tran hoang
cong van » cong vang, cong san, song van

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 - manh tuong ((tranh hang) or (tran hung)) cong van ((luan van) or (doan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - manh tuong ((tranh hang) OR (tran hung)) cong van ((luan van) OR (doan va)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - manh tuong ((tranh hang) or (tran hung)) cong van ((luan van) or (doan va))*.