Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Row = 4 And Len(Target.Text) = 0 Then Target.Offset(1, 0).Clear
If Target.Row = 4 And Len(Target.Text) >= 1 Then
Target.Offset(1, 0).Value = "=thang1"
End If
End Sub
Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Row >= 4 And (Target.Row - CInt(Target.Row / 2) * 2) = 0 And Len(Target.Text) = 0 Then Target.Offset(1, 0).Clear
If Target.Row >= 4 And (Target.Row - CInt(Target.Row / 2) * 2) = 0 And Len(Target.Text) >= 1 Then
Target.Offset(1, 0).Value = "=thang1"
End If
End Sub
and Target.Row <= 50