This should work, except when you have tables.
Code:
Sub AddFullStopToTerm()
With ActiveDocument.Content.Find
.ClearFormatting
.Text = "(No restrictions apply)([!.])"
.Replacement.ClearFormatting
.Replacement.Text = "\1.\2"
.Forward = True
.Wrap = wdFindContinue
.Format = False
.MatchCase = False
.MatchWholeWord = False
.MatchWildcards = True
.MatchSoundsLike = False
.MatchAllWordForms = False
.Execute Replace:=wdReplaceAll
End With
End Sub