It's possible:
* The name is misspelled. You may need to double-check the spelling or consider alternative spellings.
* The author is less well-known. They may not have a strong online presence or their work might be more niche.
* The author uses a different name. Some authors write under pen names or aliases.
To help me find information, please provide more context:
* What genre or subject area is Terry Richard Mathis writing in?
* Do you know anything else about them, like their location or any specific books they have written?
With more information, I can help you find the author's works.