Set<String> result = new HashSet<String>();
    String request = "https://www.google.com/search?q=" + query + "&num=20";
Document doc = Jsoup
                .connect(request)
                .userAgent(
                        "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
                .timeout(5000).get();