Add inurl:forum to the query. Google used to have a filter "discussions", but they removed it for some reason. Nowadays I usually start with https://hn.algolia.

Add inurl:forum to the query. Google used to have a filter "discussions", but they removed it for some reason. Nowadays I usually start with https://hn.algolia.com/ https://hn.algolia.com/ and site:reddit.com when I want to find a discussion.