Google Calendar Summary Text Query

I have a list of event names (unique) in a spreadsheet and I am performing actions related the events one by one using an iterator.

I asked to search the calendar for an event “[company name] - Run 3 - Kurz 4 - ([name of trainer])” - there is only one event like that in the calendar. However, for some reason, the output was for a different event “[company name] - Run 4 - Kurz 3 - ([name of trainer])”.

The company name and trainer name are the same in both cases.

Why? How do I make sure that the search matches 1:1?