Search results in CHM

When using the Search tab in CHM file, I would like users to search and find results only from the TOC list of topics rather than all the topics that are available in the project. For example, there are few incorrectly named HTML pages with incorrect content. I do not want these to appear in search results as they are not part of TOC. (I can delete these pages, but would liketo keep them for some content re-use).

Can anybody guide me on this?

Thanks.