woocommerce product search

<?php
require_once('submit.php');
if(isset($_GET['destination'], $_GET['days'], $_GET['budget'])){
    echo submit();
    return;
}
?>
<form role="search" method="get" id="searchform" action="">
<?php
$terms = get_terms("pa_country");
$count = count($terms);
if($count > 0){
echo '<select class="select" id="destination" tabindex="11"  name="destination">';
echo '<option value="Destination">--Destination--</option>';
foreach($terms as $term ){
        echo '<option value="' . $term->name . '">' . $term->name . '</option>';
    }
    echo '</select>';
}

$terms = get_terms("pa_days");
$count = count($terms);
if($count > 0){
    echo '<select class="select" id="days" tabindex="11" name="days">';
    echo '<option value="Days">--Days--</option>';
    foreach($terms as $term ){
        echo '<option value="' . $term->name . '">' . $term->name . '</option>';
    }
    echo '</select>';
}

$terms = get_terms("pa_budget");
$count = count($terms);
if($count > 0){
    echo '<select class="select" id="budget" tabindex="11" name="budget">';
    echo '<option value="Budget">--Budget--</option>';
    foreach($terms as $term ){
        echo '<option value="' . $term->name . '">' . $term->name . '</option>';
    }
    echo '</select>';
}
?>
<input type="submit" id="searchsubmit" value="<?php echo esc_attr__( 'Search' ); ?>" />
</form>