Hi, Sean:
I'm not exactly a computer savant, but of the various search engines I've used (including Copernic Pro 2000, which is installed on my computer), I find that Google does a fine job. It's fast, very accurate, etc.
You can access Google at www.google.com. To search for the topic you want, try something like "audio newsgroup", or something similar. Put the entire phrase in quotation marks, so Google looks for the whole thing, rather than the separate words. To the right of the box where you enter the search topic, you will also noted a link for "Advanced Search". You can do a more specialized search by using that link.
BTW, I continue to enjoy your comments and advice here on Audiogon. Thanks for your quality participation.
Best,
Scott C-