Really? BrandMeister is too common?The following words in your search query were ignored because they are too common words: BrandMeister password.
You must specify at least one word to search for. Each word must consist of at least 3 characters and must not contain more than 14 characters excluding wildcards.
Anyway, the solution is to do a site search in a search engine. For example, using google.com:
site:https://forum.pistar.uk/ brandmeister password
returns a page of results and the first two results were the topics I was looking for.