Are newspapers liable for the quotes they print? I thought not, and that is why they always so careful about saying "it was reported" or "so said who and who" to make clear any quotes were not coming from the paper and so they weren't liable.
A search result is even less than a quote. Autosuggest, hmmmm.
Can't google sue for defamation for this statement by Dr Janice Duffy “... I beat the bastards,” or this one "... Google can’t come into our country, destroy reputations and get away with it.”
Both are defamatory and the first is patently false (maybe so much so it then doesn't count as defamation) the second though is certainly debatable and plausibly harmful to Google.