Hi, up to v6.7, the plugin worked well even when looking for phrases consisting of several words. Example:
lists the three articles in my personal blog with the headline consisting of the same five words (plus a number in brackets).
In all later versions of the plugin, this phrase search does not work anymore, so I had to freeze the last version that worked fine for me.
The current version would list a lot of other articles as well that don't contain the search phrase; obviously because the plugin is no longer looking for the exact phrase, but (only) for ONE of the words in it.
Personally, I think that this is a bug and not a feature and I'd be really happy if the original functionality would be restored in one of the next releases. Thanks!