A recent message from Bryan Carson of Western Kentucky University Libraries to LAW-LIB reported that the Chronicle of Higher Education reported recently that the group of college libraries working with Google on their book scanning project, the HathiTrust Digital Library, has released its own search tool for Google Books. According to the article (which can be found at http://tinyurl.com/yc3nlhv), this will return all pages with the search term. This is an improvement over the regular Google book search, which only returns a partial result list.
This search tool is especially important now that Google Books has actually digitized a fair number of opinions, statutes, treatises, and legislative hearing records. Carson reports that a student searching his library for the 1919 Civil Code of California found it in full text on Google Books.
The Hathitrust Digital Library Search can be found at http://catalog.hathitrust.org/