Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
van hang » van khang, van hoang, van thang
nong tan » nong dan, nong san, nong van
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap
va hang » va nang, va lang, va hanh

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 - thanh cong ((va hang) OR (van hang)) ((nong tan) OR (cong tan)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh cong ((va hang) OR (van hang)) ((nong tan) or (cong tan)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh cong ((va hang) OR (van hang)) ((nong tan) or (cong tan)) toan cao*.