Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hinh dinh » binh dinh, trinh dinh, hinh anh
nong tan » nong dan, nong san, nong van
cong tan » cong tac, cong san, cong thanh
toan tap » toan ban
va hang » van hang, va lang, va hanh
va nang » van nang, da nang, cam nang

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