how to scrap for "Searches related to casperjs" when i fired casperjs in google using casperjs

I have tried to find that line because it is in the tag but I couldn't get it.

var casper = require('casper').create({
    viewportSize: {width: 1024, height: 1024}
});
var selectXPath = require('casper').selectXPath;
casper.start('http://www.google.com/', function() {
    this.capture('C:/Users/PC/Desktop/ss/pp.png');
});
casper.then(function() {
    this.fill('form[action="/search"]', { q: 'casperjs' }, true);
});
casper.then(function(){
    casper.wait(500, function(){
       var nbNodes = this.getElementsInfo(selectXPath('//h3'));
       this.echo(nbNodes.length);
       for (var i = 0; i < nbNodes.length; i++) {
           this.echo(nbNodes[i].text, true); 
       };    

    });
});
casper.run();

In this I can't find that line.