When it comes to the Google search box, you already know the tricks: finding exact phrases matches using quotes like "so say we all" or searching a single site using site:lifehacker.com gmail. But there are many more oblique, clever, and lesser-known search recipes and operators that work from that unassuming little input box. Dozens of Google search guides detail the tips you already know, but today we're skipping the obvious and highlighting our favorite obscure Google web search tricks.....(free).....