Sub Demo()
Application.ScreenUpdating = False
Dim i As Long
With ActiveDocument.Range
  With .Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .Text = ""
    .Replacement.Text = ""
    .Font.Italic = True
    .Forward = True
    .Wrap = wdFindStop
    .Format = True
  End With
  Do While .Find.Execute
    i = i + 1
    .InsertBefore "("
    With .Duplicate
      .Collapse wdCollapseEnd
      .Text = ")"
      .Font.Italic = False
    End With
    If .Information(wdWithInTable) = True Then
      If .End = .Cells(1).Range.End - 1 Then
        .End = .Cells(1).Range.End
        .Collapse wdCollapseEnd
        If .Information(wdAtEndOfRowMarker) = True Then
          .End = .End + 1
        End If
      End If
    End If
    .Collapse wdCollapseEnd
    If (ActiveDocument.Range.End - .End) < 2 Then Exit Do
  Loop
End With
Application.ScreenUpdating = True
MsgBox i & " instances found."
End Sub