Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
va thong » va thuong, va phuong, he thong
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - ((hanh trinh) OR (canh tranh)) va thong ((cong dan) or (cong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((hanh trinh) OR (canh tranh)) va thong ((cong dan) OR (cong tac)) toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((hanh trinh) OR (canh tranh)) va thong ((cong dan) or (cong tac)) toan ban*".