Google search returns approximate results, related results, results with your words split (or joined) and other nonsense to drive ad views.
Even using the so-called "power tools" like allinsite: and the (barely functional) quotation marks, you still get very shoddy results.
Anyone who ever searches for very specific groups of terms knows exactly what I am talking about: enter search terms, click on result, search in page for term, doesn't exist.