400. That’s an error.

Google cannot redirect you to http://dogbert.abebooks.com/servlet/SearchResults?tn=M%C3%A4rchen+erz%C3%A4hlungen+New+ed.,+rev.+author+H.+S.+Guerber,+direct-method+exercises+revised+vocabulary+W.+R.+Myers+... 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.