How do I get the same results as I have in regular Google Search through Api Google Search?

When I search Chris Brown through api I get these results:

ButinGooglesearchbybrowsertheresultsaredifferent:

Assumptions:

• Throughthesearchinthesite,eventhoughIamnotloggedin,thesearchoccursbasedonsomeadditionalinformationextractedfromthebrowser.Ipandlanguage,forexample...
• ThinkinginthiswayIfiguredtheremightbesomeparametersthatwouldallowmetousetheapiinthesamewayasthebrowser.

DoesanyonehaveadeeperideaofthedifferencesinthesearchforeachandhowcanImakethemthesameorsimilar?

Code:

<?php$query=urlencode('ChrisBrown');$url="http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=".$query;
    $body = file_get_contents($url);
    $json = json_decode($body);


    for($x=0; $x < count($json->responseData->results); $x++){
        echo "<b>Resultado ".($x+1)."</b>";
        echo "<br>URL: ";
        echo $json->responseData->results[$x]->url;
        echo "<br>VisibleURL: ";
        echo $json->responseData->results[$x]->visibleUrl;
        echo "<br>Título: ";
        echo $json->responseData->results[$x]->title;
        echo "<br><br>";
    }
?>