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Metaquery

$meta_query = array(
	'relation' => 'OR',
	array(
		'key'     => 'assunto',
		'value'   => 'nome',
		'compare' => 'LIKE',
	),
	array(
		'key'     => 'regiao',
		'value'   => 'nome',
		'compare' => 'LIKE',
	),
);