Perhaps you should try some spelling variations:
cua thuong » cua truong, cua phuong, ca thuong
sua thuong » luat thuong, xuat thuong, va thuong
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
dan toan » van toan, dan than, manh toan
van tuan » van quan, van ban, anh tuan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh chinh ((sua thuong) OR (cua thuong)) con ((dan toan) OR (van tuan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh chinh ((sua thuong) OR (cua thuong)) con ((dan toan) or (van tuan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh chinh ((sua thuong) OR (cua thuong)) con ((dan toan) or (van tuan)) cau*.