false results

when searching for a rare term, that occurs on site one one or two pages/posts, I got another wrong result – the last post at the first position, where the search term is not. See https://www.esoz.cz/?s=moodle. You surely will not understand the language but might not be relevant, cause you can search for the “moodle” anyway. Can you help?

https://www.ads-software.com/extend/plugins/relevanssi/