Many of us have been saying for a while that the search engine that will kill Google is Google itself. It has come so close in the past, two of the more recent incidents being the removal of the plus sign from general web search and stopping the ‘ANDing’ of search terms. Prefixing search terms with the plus sign enabled searchers to disable Google’s synonym and variation search so that it carried out an exact match search. It still works in Google Scholar but not in general web search; Google is now using the ‘+’ prefix within Google+ to help users find Google+ business pages, for example +BASF will quickly take you to the BASF business page. Google redeemed itself to some extent by hastily bringing in the Verbatim option, which can be found in the left hand menu of your results page. This will run your search exactly as you specify it (Google: Verbatim for exact match search http://www.rba.co.uk/wordpress/2011/11/18/google-verbatim-for-exact-match-search/). However, while it works with Google commands such as ‘filetype:’ and ‘site:’ it gives up as soon as you start using some of the options in the left hand menu on the results page, such as date.
Source: Karen Blakeman’s Blog