主题：这段筛选代码为什么会报错？

请专家指点，下面代码能正常输入，但执行时报错，如何修改

Dim qu As WinForm.ComboBox = e.Form.Controls("区")
Dim zxx As WinForm.ComboBox = e.Form.Controls("中小学")
Dim xx As WinForm.ComboBox = e.Form.Controls("学校")
Dim xm As WinForm.ComboBox = e.Form.Controls("项目")
Tables("报名表").Filter="区= '" & qu.Text & "'And 中小学like '*" & zxx.Text & "*'and 学校 like '*" & xx.Text & "*'and参赛项目like '*" & xm.Text & "*'"

只选择“区”提示：Syntax error: Missing operand after ''**'' operator.

选择“区”，“中小学”提示：Syntax error: Missing operand after ''*小学组*'' operator.