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Serviços – Query Intersection

// WP_Query arguments
$args = array(
	'post_type'              => array( 'servicos' ),
	'order'                  => 'ASC',
	'orderby'                => 'title',
	'tax_query'              => array(
		'relation' => 'AND',
		array(
			'taxonomy'         => 'tax_servico',
			'terms'            => 'CHANGE HERE',
			'field'            => 'slug',
		),
		array(
			'taxonomy'         => 'subtax_servico',
			'terms'            => 'CHANGE HERE',
			'field'            => 'slug',
		),
	),
);

// The Query
$servicos_filtered = new WP_Query( $args );