The goal was to search for a specific uei.opennms.org/bsm/serviceProblem event.
In this case "Virtual Host Cluster IT"
Searching for the UEI does not help because you will find many other events and you can't filter them as required.
So I've tried to search for a string in this event as you can see here:
As you can see in the results, the single quotes are not interpreted correctly and the search will not find anything: