It's possible:
* There's a misspelling. Could you double-check the name?
* The person is relatively unknown. Perhaps they have a smaller filmography or work primarily in a niche area.
To help me find the right person, could you provide:
* More details about Leslie Toth? Do you know their gender, approximate age, or any other identifying information?
* Any other projects they might be involved in? Are they an actor, director, writer, etc.?
With more information, I might be able to help you find their filmography!