> If there's no match at all for a quoted term, we will show other matches but also make that clear with a special message.

I disagree that you "make that clear". It's rendered in the same light grey that the rest of the text on the page is in. I have several times noticed the message only after going through a few links. It's very easy to miss if you're in a hurry.

I think usability has been sacrificed for aesthetics here.