How do I use the “nongnong” anchor on fiwfan’s Nongnong-Alternative page?

I’m looking for help with the “nongnong” anchor on the fiwfan Nongnong. When I see or use “nongnong,” I’m not sure what role it plays in the search and filtering process. Does it act like a keyword to group similar listings, a shortcut to jump to a specific category, or a marker that helps the page organize results? In particular, I want to know how to use “nongnong” effectively to find the listings I’m interested in without getting irrelevant results. If “nongnong” is meant to narrow down options, what filters or steps should I combine it with? Also, how can I tell whether the results shown are actually connected to the “nongnong” anchor versus just general listings on the page?