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
thong cong » trong cong, tong cong, thong thong
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
thanh cac » hanh cac, thanh bac, tranh cac
cong dan » cong san, cong tan, huong dan
thanh ca » thanh cha, thanh ha, thanh va

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