A whole business scenario end to end: what you get and how you get there, across every screen you have to touch. A guide explains one screen; a use case joins several of them into one job.
Several words: every term has to match. Esc clears the field and shows the whole list again.
No use case matches your input. Try a different term or press Esc to clear the search.
The first use cases are on the way. In the meantime see the Instructions — use cases will join them into complete jobs.