How to search new documentation format / use old documentation format?

The docs team has just posted a blog about the retirement of the old portal and is responding to the community's requests for improvements to the new.

They did add a search widget (which is in the screenshot in the docs blog article). Currently it only appears to work for single word searches. I suspect it will improve over time.

This problem has the attention of the most senior people in the docs and the developer.salesforce.com organizations and work is in progress to address the usability feedback we are getting.