终于想出了解决办法。如果有人觉得有用就回答。哪里$_GET[\'s_qr\'] 具有来自另一个页面的用户的搜索查询。

    $i = 0;
    $parent_name = \'\';
    $taxonomyName = "product-cat";
    $search_r = array();
    $parent_terms = get_terms( $taxonomyName, array( \'parent\' => 0, \'orderby\' => \'slug\', \'hide_empty\' => false ) );   

    foreach ( $parent_terms as $pterm ) {
        $parent_name_1 = $pterm->name;
        $terms = get_terms( $taxonomyName, array( \'parent\' => $pterm->term_id, \'orderby\' => \'slug\', \'hide_empty\' => false ) );
        foreach ( $terms as $term ) {
            //Find if the the category name has the search query
            if (stripos($term->name, $_GET[\'s_qr\']) !== false) {
                $search_r[\'item\'][$i] = $term->name. " in ".$parent_name_1;   
                $i++;
            }
        }
    }
    print_r($search_r);