Find body tag in an ajax HTML response

I'm making an ajax call to fetch content and append this content like this:

$(function(){
    var site = $('input').val();
    $.get('file.php', { site:site }, function(data){
        mas = $(data).find('a');
        mas.map(function(elem, index) {
            divs = $(this).html();
            $('#result').append('' + divs + '');
        })
    }, 'html');
});

The problem is that when I change a in body I get nothing (no error, just no html). Im assuming body is a tag just like 'a' is? What am I doing wrong?

So this works for me:

 mas = $(data).find('a');

But this doesn't:

 mas = $(data).find('body');