Sub Demo()
Application.ScreenUpdating = False
With ActiveDocument.Range
  .InsertBefore vbCr
  With .Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .Text = "(^13[!^13]@^t[!^13]@)^t"
    .Replacement.Text = "\1 "
    .Forward = True
    .Wrap = wdFindContinue
    .MatchWildcards = True
  End With
  Do While .Find.Execute = True
    .Find.Execute Replace:=wdReplaceAll
  Loop
  .Characters.First.Text = vbNullString
End With
Application.ScreenUpdating = True
End Sub