Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung hung » trung dung, truong chung, truong huong
trong hung » trong nhung, trong phung, trong rung
doi chieu » doc hieu, doi chi, mot chieu
anh quang » anh xquang, anh quan, nhanh quang
cong tap » cuong tap, cong tac, cong tan
toan cau » toan cao, toan tap, toan tai
toan ban » van 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 - anh quang ((trung hung) or (trong hung)) cong tap ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - anh quang ((trung hung) OR (trong hung)) cong tap ((toan cau) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - anh quang ((trung hung) or (trong hung)) cong tap ((toan cau) OR (toan ban))*".