Various edits I made in the past 30 minutes are not visible in Search Results.
Normally it takes less than thirty seconds to update.
Example: This search query should return no result at all now, yet it gives 5 results at this time.
Note that I reported a similar issue 5 months ago, but it was for rare isolated posts. Today all the edits seem affected.
 Seems fixed, about a bit more than an hour later.
[next day] Same issue today with this search query.
 Seems fixed, quite more than three hours later. See Nick Craver's answer.