400. That’s an error.

Google cannot redirect you to http://www.abebooks.de/servlet/SearchResults?tn=%E6%B5%B7%E5%A4%96%E8%88%87%E4%B8%AD%E5%9C%8B:+%E7%B7%AC%E7%94%B8%E8%88%87%E4%B8%AD%E5%9C%8B 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.