Search doesn't return any downloads
By default, WordPress search only looks for titles, content, and the excerpt. As a result, your downloads will not appear in the search results. To include these items in your search, we suggest using Relevanssi. Relevanssi allows you to expand the index of returned items in your search.
Install the plugin and head to the Settings page (Settings > Relevanssi). First, you want to make sure you include your download tags and categories:
Then, make sure you build your index.