How to filtering or search a TreeView?

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C#

XAML

WPF

Hi guys,

I have a problem about filtering TreeViewItems in TreeView under WPF using TreeView.Items.Filter property or stuff like this, I also read around the issue in Filtering Collections section of Pro WPF in C# book and research on internet, but can't get ideal result.
Alright there is a TreeView and a TextBox in my XAML code, in the TreeView is many nested TreeViewItem.

<TreeView>
    <TreeViewItem Header="root" IsExpanded="True">
        <TreeViewItem Header="h1">
            <TreeViewItem Header="h11" />
            <TreeViewItem Header="h12" />
        </TreeViewItem>
        <TreeViewItem Header="h2">
            <TreeViewItem Header="h21" />
            <TreeViewItem Header="h22">
                <TreeViewItem Header="k1">
                    <TreeViewItem Header="k11" />
                    <TreeViewItem Header="k12"/>
                </TreeViewItem>
            </TreeViewItem>
        </TreeViewItem>
    </TreeViewItem>
</TreeView>

I want to show/filtering TreeViewItems that contain a term of in the TextBox. Please say me your point of view?

Thanks in advance.