Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhanh dung » nhanh dong, hanh dung, thanh dung
nhanh hung » thanh hung, nhanh hong, nhanh chuong
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
cua thong » cua thuong, cua khong, cua tong
dan than » dan chan, ban than, van than

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((nhanh dung) OR (nhanh hung)) cua thong cong ((xuan toan) OR (dan than)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((nhanh dung) OR (nhanh hung)) cua thong cong ((xuan toan) or (dan than)) tap~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((nhanh dung) OR (nhanh hung)) cua thong cong ((xuan toan) or (dan than)) tap*.