Our search missing one word

Hello, we installed your plugin but we realized our search is not displaying results, it’s missing to get one word which is “tesla” see example below

Link after search: https://sopriza.com/?s=d%201557%20why%20tesla%20semi%20is%20the%20future%20of%20trucks

Telsa result not shown.

But if you search only tesla, results are shown. Please teach us how we can improve this one. Thank you!