Getting the most out of the Universal Search feature is sometimes a challenge...To get your content, courses and other assets proper visibility and to make sure they appear in user search results, use the TAGS option to include those keywords your users would typically use to find the content. Sometimes it’s not enough to use the auto-generated tags and I found that using the course title (in some cases) gets that asset to the top of the search results.
Tags are really useful when used fully.