How to set Query search settings

Hello,
I work since few days on a project that was created by unavailable people, it's a symfony 4, sylius & Elastic Search project. I've never touch ElasticSearch or Sylius so I'm a little lost about the configuration settings.

Actually, when I dump a research, I can see ""minimum_should_match" => 2"
I want to change that, because it's way too low but I can't find where can I change that.

I suppose it's in the fos_elastica.yaml but I'm not sûre.

Thanks.