Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hang hang » nang hang, cang thang, hung thang
dung cong » dung trong
tong cong » trong cong, cong cong, dang cong
ho chieu » theo chieu, hoc thieu, doi chieu
tran cau » tran chau, toan cau, ran cau
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hang hang va ((dung cong) or (tong cong)) tac ((tran cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hang hang va ((dung cong) OR (tong cong)) tac ((tran cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hang hang va ((dung cong) or (tong cong)) tac ((tran cau) or (toan cao))*.