Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trang » thanh trung, canh tranh, hanh trinh
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
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 xanh)) - hanh trang cua nhung ((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 xanh)) - hanh trang cua nhung ((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 xanh)) - hanh trang cua nhung ((nong dan) OR (nong san)) than cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu nhi) or (chieu xanh)) - hanh trang cua nhung ((nong dan) OR (nong san)) than cao*.