It's possible that:
* The name is misspelled. Try searching for variations of the name, or checking for middle initials.
* The author has a different pen name. You could try searching for books by that name, or looking for publications associated with other names they may have used.
* The author may not be widely published. If they're a newer author, self-published author, or writing in a niche genre, their work may be harder to find online.
Could you provide more information? For example, are you looking for a specific book or genre? Knowing more could help in tracking down the author's work.