Search returns no results when searching on keywords in titles

[wswtizer]

Is there information on what is allowed in the search field? When I search on keywords in titles, I get no results. For example, I've tried searching for "Working with notebooks in IBM Data Science Experience" both with and without quotes, and just using one word, or subset of words, but I get no results.

Thanks.

[alakhana]

Free text doesn't seem to work, but searching with key:"value" does work.
Eg: name:"Working with notebooks" or name:"Spark" AND status:"Live"