Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
thang cong » thanh cong, thong cong, hang cong
thang long » thanh cong
hanh luan » khanh luan, hang luan, hanh luat
van thanh » ban thanh, van tuan
thanh cau » thanh chau, thanh mau, nhanh cau

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 xanh) OR (chieu xanh)) - hanh luan van ((thang cong) or (thang long)) van thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - hanh luan van ((thang cong) OR (thang long)) van thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - hanh luan van ((thang cong) or (thang long)) van thanh cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - hanh luan van ((thang cong) or (thang long)) van thanh cau*.