Thank you very much for the proper details!
Exact matching is probably not what you need. I understand that it's a bit confusing, but matching the whole phrase whithin a text anywhere is also considered as an exact match. It's more useful whenever expecting multiple search phrases matched against long text fields. It's due to the limitations of MySQL regarding word boundary recognition and similar things.
I believe you should rahter try turning off the exact matching and use the 'AND with exact word matches' logic: https://i.imgur.com/tqyWnan.png
It's actually a lot more strict logic, and it works best with the index table engine, but will work in some extend with the default one as well.
I hope this helps!Best,
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