您可以使用WP_query() 要缩小搜索结果的范围，请执行以下操作：

<?php $args = array(
    \'s\' => $_GET[\'s\'],
    \'post_type\' => array( \'post\', \'page\' ),
    \'post_status\' => \'publish\',
    \'category_name\' => \'music\',
    \'posts_per_page\' => -1
);
$custom_search = new WP_Query( $args );
if ( $custom_search->have_posts() ) {
    while ( $custom_search->have_posts() ) : $custom_search->the_post(); ?>
         <div class="entry-content">
            <h2 class="title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
            <?php the_excerpt(); ?>
        </div>

    <?php endwhile;

} else { ?>
    <h2>Your search didn\'t return any results.</h2>
<?php } ?>