Typesense (and most search engines) only support prefix queries. So

+1

,

+15

,

+1555

, etc will return

<tel:+15553337895|+15553337895>

, but searching for a sub-string that is not the start of the string like

7895

(non-prefix) will not return that record. If you need to match sub-strings, I'd recommend breaking out the phone number into space separated sub-sections like

<tel:15553337895|1 555 333 7895>

or an array like CaptainCodeman mentions above. Or if you just need to search for last 4 digits, you could put just that in a separate field.