我创建了一个自定义搜索，可以在其中显示字段（ACF字段）和分类法。但是，当我通过结合分类法和元字段进行搜索时，我没有得到结果。如果我搜索分类法或元字段，它会给出结果。如何使这两个条件一起工作？

这是我提到meta\\u query和tax\\u query的代码：-

<?php
if($_POST){
    $_speciality = $_POST[\'speciality\'] != \'\' ? $_POST[\'speciality\'] : \'\';
    $_students_last_name = $_POST[\'students_last_name\'] != \'\' ? $_POST[\'students_last_name\'] : \'\';

    if($_speciality!=" "){
        $param1 = array(
            \'key\' => \'speciality\',
            \'compare\' => \'=\',
            \'value\' => $_speciality
        );
    } else{
        $param1 = "";
    }

    if($_students_last_name!=" "){
        $param2=array(
            \'key\'       => \'students_last_name\',
            \'compare\'   => \'LIKE\',
            \'value\'     => $_students_last_name
        );
    } else{
        $param2="";
    }

    $args = array(
        \'post_type\' => \'students\',
        \'orderby\'   => \'date\',
        \'order\'     => \'DESC\',
        \'tax_query\' => array(
            array(
                \'taxonomy\'  => \'Music\',
                \'field\'     => \'slug\',
                \'terms\'     => $param1
            )
        ),
        \'meta_query\' => array(
            \'relation\' => \'AND\',
            $param2
        ),      
    );

} else {
    $args = array(
        \'post_type\' => \'students\',
        \'orderby\' => \'date\',
        \'order\' => \'DESC\'
    );
}

$the_query = new WP_Query( $args );