400. That’s an error.

Google cannot redirect you to http://www.abebooks.fr/servlet/SearchResults?tn=Dictionnaire+%C3%A9tymologique,+historique+et+anecdotique+des+proverbes+et+des+locutions+proverbiales+langue+fran%C3%A7aise+rapport+avec+des+proverbes+et+des+locutions+proverbiales+des+autres+langues because the request was invalid.

This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.