Google

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ar h3 = document.getElementsByTagName('h3');
for(var i=0;i<h3.length;i++){
    var a = h3[i]. getElementsByTagName('a');
    console.log(a[0].href);
}

Bing

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var h3 = document.getElementsByTagName('h2');
for(var i=0;i<h3.length;i++){
    var a = h3[i]. getElementsByTagName('a');
    console.log(a[0].href);
}