I'd say the search works incorrectly, but verbatim is verbatim, which means it doesn't actually work as intended.
When looking for a phrase
This post does not cite any references or sources, search shows me 10 results, omitting
or. I know, because search optimization, right? But when I distrustingly looked for
"This post does not cite any references or sources", I got no results. Right when there were just about ten of them. Not so verbatim after all?