Try this.

$type = \'buehne\';  // Name of the Custom Post Types
$tag =  \'TagName\';


$args =  array(
        \'post_type\' => $type, 
        \'paged\' => $paged,
        \'posts_per_page\' => -1, 
        \'orderby\' => \'menu_order\',
        \'order\' => \'ASC\', 
                \'tax_query\'=>array(
                    array(
            \'taxonomy\'=>\'th3\', //name of the Taxonom 
            \'field\'=>\'slug\',
            \'terms\'=>array($tag)
                            ))
                    );



$loop = new WP_Query( $args );
while ( $loop->have_posts() ) : $loop->the_post();
    if(is_object_in_term($post->ID,\'th3\',\'TagName\')) {  
        the_title(); ";

    }
endwhile;