Alex Chitu noticed that Google is now showing the keywords Google did not match on for your long tail search. The example below shows how Google did not match on a specific keyword within the search phrase and noted that under the search results snippet.
We have to suspect this is part of the Hummingbird algorithm doing its job.
Google prefers to show some search results even when there isn’t an exact match, especially if the searcher is being so specific.
Google’s way of informing the searcher that it wasn’t an exact match is by detailing which keywords Google could not match on, within each returned result.