View in datagrid all data from master table where relationship with other table in ms access using in VB.NET

my problem in SQL query, result has been successful to load data in datagrid like SL_No (2,4,5) but some data are missing from table Pairing like (1,2,3,4,5,6) where relationship table data is not available like (1,3,6) in Receipt table.

Private Sub BtnView_Click(sender As Object, e As EventArgs) Handles btnView.Click

    Dim Sql as String = "Select Pairing.Ledger_Index, Pairing.Fr_Customer_no, Pairing.Fr_Customer_nm, Receipt.Dt_Entry, Receipt.Price from Pairing INNER JOIN Receipt ON Pairing.Fr_Customer_no = Receipt.Sub_No WHERE (((Pairing.Ledger_Address)='" & cmbList.Text & "'))""

    If RdoLedger.Checked=True Then
       DatagridView_Load("sql",DatagridView1)
    End If

End Sub

Public Function DatagridView_Load(ByVal Sql As String, ByVal Model As DataGridView)
    Try
        If con.State = ConnectionState.Open Then
            con.Close()
        End If
        Model.DataSource = Nothing
        Dim da As New OleDbDataAdapter(Sql, con)
        Dim dt As New DataTable
        dt.Clear()
        da.Fill(dt)
        If IsDBNull(dt) = False Then
            Model.DataSource = (dt)
            con.Close()
        Else
            Model.DataSource = Nothing
            con.Close()
        End If

    Catch ex As Exception
        MsgBox("ERROR : " & ex.Message.ToString)
    End Try
    Return True
End Function