Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung ha
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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 - manh ((trung va) or (truong dai)) dung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - manh ((trung va) OR (truong dai)) dung cong tac toan tap*.