Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
cong thang » cong thanh, cang thang, cong thong
chinh cua » chinh ca, chinh sua, hinh cua
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
thang cau » hang cau, thong cau, thanh chau

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