When searching in the mobile interface, spaces and/or space home pages are excluded from search results. However, personal spaces do appear to be included.

Hits to the space or space home page could be presented as a another category in the search results screen (along with People, Content, etc) or through an icon as Content hit.

Alternatively, the user could be given control over the over the ability to include or exclude spaces/space homes pages from the search results, either through a profile setting or a dynamic filter.