Back when Google Hacks came out there were many search tips there that were not on Googles Advanced search page... but since then Google has expanded the Advanced options.

I've looked at a few sites like googleguide.com, but see that the stuff is already there as an option in Advanced search.

Does anyone know of a site that shows "google hacks" that are not "advertised" as options by Google?

... just curious...

Give this a try

That's the site I referenced... but see I did not look close enough. I see now that they do have some specialized queries that are not listed by Google here.