Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
doi chiet » doi chieu, doi chi, doi viet
doanh cua » doanh luan
mang cua » manh cua, dung cua, ban cua
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - cach ((mang cua) or (doanh cua)) nhung cong ((tac toan) OR (tam toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - cach ((mang cua) OR (doanh cua)) nhung cong ((tac toan) OR (tam toan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - cach ((mang cua) or (doanh cua)) nhung cong ((tac toan) OR (tam toan)) cau*".