Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
lanh bang » anh bang, lanh sang, can bang
hach toan » thanh toan, manh toan
ho chieu » theo chieu, hoc thieu, doi chieu
he trong » he thong, he trung, le trong
tac toan » tap toan, tam toan, tich toan
bang he » bang khi

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 - lanh bang he trong cong ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - lanh bang he trong cong ((tac toan) OR (hach toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - lanh bang he trong cong ((tac toan) or (hach toan)) cau*.