with OR.. I get nothing
quotes don't seem to function either.
You might want to move this out of GeoNet Help and over to ArcGIS Online to get more exposure to the audience you want.
No the find operation does not support AND or OR operators.
Returns information about features in one or more fields in one or more layers based on a keyword
Notice the key word above is "a".
You can see the documentation here:
ArcGIS REST API - Services and Data Types
Retrieving data ...