nella cartella del tuo template hai index.php controlla se esiste questo tag qui sotto
<form id="cse-search-box" target="_blank" action="http://www.google.it/cse">
<div>
<input type="hidden" value="partner-pub-0727087414287045:uuap3ucn52a" name="cx"/>
<input type="hidden" value="ISO-8859-1" name="ie"/>
<input type="text" size="31" name="q" style="border: 1px solid rgb(126, 157, 185); padding: 2px; background: rgb(255, 255, 255) url(http://www.google.com/coop/intl/it/images/google_custom_search_watermark.gif) no-repeat scroll left center; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"/>
<input type="submit" value="Cerca" name="sa"/>
</div>
</form>
se esiste modificalo in questo modo
<form id="cse-search-box" target="_blank" action="http://www.google.it/cse">
<div style="float: right; padding-top: 25px;">
<input type="hidden" value="partner-pub-0727087414287045:uuap3ucn52a" name="cx"/>
<input type="hidden" value="ISO-8859-1" name="ie"/>
<input type="text" size="31" name="q" style="border: 1px solid rgb(126, 157, 185); padding: 2px; background: rgb(255, 255, 255) url(http://www.google.com/coop/intl/it/images/google_custom_search_watermark.gif) no-repeat scroll left center; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"/>
<input type="submit" value="Cerca" name="sa"/>
</div>
</form>