Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
hoc chieu » hoc thieu, ho chieu, hoc hien
cong cong » cong dong, trong cong, dung cong
dang cong » dung cong
toan gian » toan giao, toan giai, tran gian
gian dan » gian lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - thanh dung luan ((cong cong) or (dang cong)) toan gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - thanh dung luan ((cong cong) OR (dang cong)) toan gian dan*.