You can add author: keyword to filter results even further.
https://ecency.com/search/?q=jazz%20author%3Afjcalduch

Using 1 word usually has different weight on different posts, try adding 2 or 3 words to filter results further. With jazz you probably see your posts as well but your content is competing with other content for ranking and how keyword is used. For example I see many posts with jazz in their title...