That sort of search will still find results in all forum sections as long as they happen to contain those keywords but that should narrow it down quite a bit even if you do get some results from other forum sections. I tried adding the specific forum path string (e.g. "Arduino Forum > Using Arduino > Audio") to the search but unfortunately there is some weird formatting of that path as displayed on the forum pages so I just get no results. I also tried skipping over the areas of weird formatting: (e.g. "> Using Arduino" "> Audio"). But Google loves to do a fuzzy search even when you have it set to "verbatim" mode so I still end up with results from other sections.