Show Gmail and Google Drive Results in Google Search

I mentioned last week that you can join an experiment that lets you see results from Gmail and Google Drive in Google Search.

Google shows personal results if they are likely to be relevant to your query, but there's an easy way to trigger the results. Start your query with "gmail" to see Gmail results and "drive" to see results from Google Drive.

Unfortunately, you can't use advanced search operators to restrict results to a Gmail label, to messages from a contact, to starred files or use other features because they're ignored by Google.