Discussions / Wishlist ability to search and/or filter by keyword in Product Hub or Sync Portal Search

It's currently very difficult to filter the Product Hub - Discussions / Wishlist list of posts by specific keywords. The best I can find is by doing a general Search in Sync Portal, but this brings up a bunch of unrelated Articles and whatnot. If there was a way to Search "within" just the Wishlist list of posts, that'd address my need. Or, if there was a way to "filter" in the general Sync Portal Search by post/document types including Discussions and/or Wishlist, that'd work for me, too.

My desire to be able to do this is to find existing Wishlist or Discussion posts related to topics of interest to potentially Upvote or Comment on before I take the time to submit them myself (only to potentially happen across an existing post later).