Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
cua trong » cua truong, cua trung, qua trong
thanh cac » hanh cac, thanh bac, thanh ca
cong dan » cong tan, huong dan, cong dong
cong san » cong tac

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

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