In the livesearch macro in Confluence it's not possible to add questions to the 'content type to include in search'. It would be even better if you can include more than 1 type of content. In our case we would create a search function that searches all content in 'Confluence pages' and 'Confluence questions'. Now you can only select one type op content (page, blogpost, comment or spacedescr) and Confluence questions is not yet part of it.