There are several ways on how to search stuff from the Powder Toy website.

• The original search from topics https://powdertoy.co.uk/Discussions/Search/Topics.html
• Posts by author: https://powdertoy.co.uk/Discussions/Search/PostsByAuthor.html
• The best and most reliable way(Most of you already use it): Just add a search word with site:powdertoy.co.uk to the end.

Just clearing stuff up for the new people here.