Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhanh tinh » nhanh thanh, nhan sinh
hanh trinh » canh tranh, hanh chinh
quan thanh » ban thanh, van thanh
ho chieu » theo chieu, hoc thieu, doi chieu
dan than » dan chan, ban than, van than
ban hang » ngan hang

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: ho chieu sach - ((nhanh tinh) OR (hanh trinh)) quan thanh cong ((dan than) OR (ban hang)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((nhanh tinh) OR (hanh trinh)) quan thanh cong ((dan than) or (ban hang)) ban~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((nhanh tinh) OR (hanh trinh)) quan thanh cong ((dan than) or (ban hang)) ban*.