It depends on how these keywords are exactly stored – from the screenshot I am guessing that is a custom field (post meta)?
On the plugin General Options -> Sources panel you can disable all fields to search, and choose the corresponding custom field that contains this string: https://i.imgur.com/HHtpiIV.png
Under the Autocomplete & Suggestions panel you can disable both the autocomplete and the keyword suggestions (did you mean):
– Autocomplete: https://i.imgur.com/f8BRC6U.png
– KW Suggestions: https://i.imgur.com/Yu9TAPA.png
I hope this helps!Best,
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