It used to be enough to append the word "reddit" but now Google tends to ignore it! It learned to route around people's desire to get useful results and learned to ignore it and show the garbage links instead. You can still get it with "site:reddit.com" though. I wonder when they will remove this option. Afaik a lot of search operators are already undocumented. And they removed the "+" for forcing inclusion of a term, so that only quotes worked as intended, but then also removed full support for quotes and it's now just a hint. Probably every step boosts some engineer's or manager's short term metrics and evaluation reports so it keeps happening.
