If this is the case, it could be that you're attempting to query the middle of a word. Algolia does not support infix/suffix matching. Our documentation notes that, by design, Algolia doesn’t support infix/suffix matching; it won't find substrings in the middle or the end of a string.
Searching for “Jess” will return “Jessica”, but “sica” will not return “Jessica”
Searching for “Tho” returns “Thomas”, searching “mas” will not return “Thomas”
You can read more about this in our documentation - Querying in the middle of a word.