I meant that in Stefan’s screenshot, when he typed in several letters of the keyword, the search result will start to provide some matches from wither the lables or folders created. I assume that I can simply click on either one and just directly to there. Moreover, the “Search online for…” and “Search PDFs for…” options are shown there.
However, in my Paperpile, there is no such function at all (screenshot attached). The search bar only gives me the matched articles in my personal library. I was all the time expecting the quick search available because I have hundreds of folders/sub-folders.