Site Search - Default results, site-docs indexing

Is there a way to have the default search results (when no keyword is entered) be an explicitly-defined set of pages rather than the results it is giving now? Right now it has one result whose body text only shows as “]]” (Chrono) and then near 30 different results for Any. Even if those are the "proper" results for an empty string search, I don't think there's much use to a user to get those results.

Also, is it indexing the site docs? I tried searching for “Explore the Content” but nothing comes up. (https://www.stage.boost.cppalliance.org/doc/user-guide/explore-the-content.html)

Thanks!