ค้นหา2 textbox ในเวลาเดียวกันยังไง และการค้นหา เฉพาะ รหัส แล้วให้แสดง รหัสที่เหมือนกันทั้งหมดแสดงใน DataGridView

Dim dr As OleDbDataReader
        Dim s As String = "SELECT * FROM tblCustomers WHERE ID_CTM ='" & txtSearch.Text & "'"
        Dim r As Integer
        dr = Executereader(s)
        dr.Read()
        DataGridView1.Rows.Clear()
        If dr.HasRows Then

            DataGridView1.Rows.Add()
            DataGridView1.Rows(r).Cells(0).Value = dr.Item(0)
            DataGridView1.Rows(r).Cells(1).Value = dr.Item(1)
            DataGridView1.Rows(r).Cells(2).Value = dr.Item(2)
            DataGridView1.Rows(r).Cells(3).Value = dr.Item(3)
            DataGridView1.Rows(r).Cells(4).Value = dr.Item(4)
            DataGridView1.Rows(r).Cells(5).Value = dr.Item(5)
            DataGridView1.Rows(r).Cells(6).Value = dr.Item(6)
            DataGridView1.Rows(r).Cells(7).Value = dr.Item(7)
            DataGridView1.Rows(r).Cells(8).Value = dr.Item(8)
            DataGridView1.Rows(r).Cells(9).Value = dr.Item(9)
            DataGridView1.Rows(r).Cells(10).Value = dr.Item(10)
            DataGridView1.Rows(r).Cells(11).Value = dr.Item(11)
            DataGridView1.Rows(r).Cells(12).Value = dr.Item(12)