Are there no Harn games?
I did a search and returned 2 active and 1 inactive games.
I entered Harn into the Game System search field and left the others blank. "Active" and "Inactive" were checked, "Only active games requesting players" was unchecked.
The options for General Content, Mature Content, Adult Content, and Sole Ownership were all checked.
I selected no Genre categories and left the "all (or more of)" option selected for the "Match how many genres?" question.