It's possible:
* The name is misspelled. Double check the spelling.
* The author uses a pen name. You could try searching for common variations of the name or looking for other possible pen names.
* The author is not well-known. It's possible that this is a lesser-known author. If you have any other information about the author or their work, it might be helpful in narrowing down the search.
Can you provide more details about Johanna Maria Louisa Kunze or the work you're interested in?