Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
cua hang » cua dang, cua nhung, cua cong
nong dan » cong dan, nguong dan, huong dan
nong san » cong san, dong san, trong san
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu nhi) or (chieu sach)) - hanh trinh cua hang ((nong dan) OR (nong san)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu nhi) OR (chieu sach)) - hanh trinh cua hang ((nong dan) OR (nong san)) than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu nhi) or (chieu sach)) - hanh trinh cua hang ((nong dan) OR (nong san)) than cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu nhi) or (chieu sach)) - hanh trinh cua hang ((nong dan) OR (nong san)) than cao*.