I don't know of a built in way of doing this but here are a couple of ways of approaching this problem.

I assume you have set the topic title as a heading so you could build a table of contents to get the complete list of topics and then sort those paragraphs which you could print out as a reference. Then go to Outline view and collapse to just the headings and then manually drag the order around to match the sorted TOC output.

It might also be possible to create a macro to automate a process to achieve the same end. A logical process for the macro to follow might be:
Convert all the content into a two column table and put the heading in the left column and the section content in the right column before sorting on column 1. Then convert the table back to paragraph text with paragraph marks as separators.

If you post a sample doc, someone might be able to make other suggestions or provide a code sample that works.

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Andrew Lockton
Chrysalis Design, Melbourne Australia