Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thuoc dung » thuy dung
chuc dung » thuc dung, chuc nang, chan dung
ho chieu » theo chieu, hoc thieu, doi chieu
hoc dung » hoc ung, hoc dan, tac dung
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh cong ((((chuc dung) OR (hoc dung))) or (thuoc dung)) cong van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh cong ((((chuc dung) OR (hoc dung))) OR (thuoc dung)) cong van toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh cong ((((chuc dung) OR (hoc dung))) or (thuoc dung)) cong van toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh cong ((((chuc dung) OR (hoc dung))) or (thuoc dung)) cong van toan tap*.