400. That’s an error.

Google cannot redirect you to http://www.abebooks.fr/servlet/SearchResults?tn=Le+origini+della+lingua+italiana+compilate+dal+s.re+Egidio+Menagio,+gentiluomo+francese.+Colla+giunta+de%27+Modi+di+dire+italiani,+raccolti,+e+dichiarati+dal+medesimo 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.