If the heading for Chapters 1.2 & 1.3 use Heading Styles, you can use Find to locate the heading, then .GoTo What:=wdGoToBookmark, Name:="\HeadingLevel" to get the corresponging content. For example:
Code:
Sub Demo()
Application.ScreenUpdating = False
Dim Rng As Range
With ActiveDocument.Range
With .Find
.ClearFormatting
.Replacement.ClearFormatting
.Text = "Heading Text"
.Style = "Heading 1"
.Format = True
.Forward = True
.MatchCase = True
.Wrap = wdFindStop
.MatchWildcards = False
.Execute
End With
If .Find.Found = True Then
Set Rng = .Duplicate.GoTo(What:=wdGoToBookmark, Name:="\HeadingLevel")
MsgBox Rng.Text
End If
End With
Application.ScreenUpdating = True
End Sub