Google is aware of an issue with Google search that won't let searchers query Google Search for really long phrases or paragraphs of text.
What happens when you try? You get a Google 414 Error that says your request was too large to process.
This was reported recently in the Google Web Search Help forums where Google's Courtney said:
Thanks for reporting this issue. We're aware that this has been happening and are working on a solution.
When will Google fix it? How long has this been an issue? I think it has been an issue for a long long time and I have no clue when Google will fix it.
You can try it yourself by searching for here or just copying a bunch of text and pasting it into the Google search box.
Forum discussion at Google Web Search Help.