Hi!
I have added the ‘event_itinerary’ and ‘wpv-view’ shortcodes to the shortcode exceptions list, on the index table panel: https://i.imgur.com/lUlvoCy.png
Looking at the event content, I have found these shortcodes that did not contain any relevant information for searching, and turns out, that probably they contained a link/text or something similar with this keyword in it. I have re-indexed the site, now those items should not show up anymore.