Sub Macro1()
Const strWord As String = "word to find"
Dim oRng As Range
Dim oFind As Range
    Set oFind = ActiveDocument.Range
    With oFind.Find
        Do While .Execute(FindText:=strWord, MatchCase:=True, MatchWholeWord:=True)
            oFind.End = oFind.Paragraphs(1).Range.End
            Set oRng = oFind.Next.Paragraphs(1).Range
            oRng = Replace(oRng, "(", "")
            oRng = Replace(oRng, ")", "")
            oFind.Collapse 0
        Loop
    End With
lbl_Exit:
    Set oFind = Nothing
    Set oRng = Nothing
    Exit Sub
End Sub

Sub Macro2()
Const strWord As String = "word to find"
Dim oRng As Range
Dim oFind As Range
Dim oSection As Section
Set oSection = Selection.Sections(1)    'the section the cursor is in
Set oFind = oSection.Range    'set a range to the section
    With oFind.Find
        'look for each occurrence of the word in turn
        Do While .Execute(FindText:=strWord, MatchCase:=True, MatchWholeWord:=True)
            If oFind.InRange(oSection.Range) Then    'the word is in the section
                oFind.End = oFind.Paragraphs(1).Range.End    'move the end of the range to the end of the paragraph
                'containing the word.
                Set oRng = oFind.Next.Paragraphs(1).Range    'set a range to the following paragraph
                oRng.End = oRng.End - 1    'omit the paragraph break character (and/or the section break)
                oRng = Replace(oRng, "(", "")    'delete the first unwanted character
                oRng = Replace(oRng, ")", "")    'delete the second unwanted character
                oFind.Collapse 0    ' collapse the found text range to its end
            Else
                GoTo lbl_Exit    'the found word is not in the section
            End If
        Loop
    End With
lbl_Exit:
    Set oSection = Nothing
    Set oFind = Nothing
    Set oRng = Nothing
    Exit Sub
End Sub