Reply To: Tag search option

For that layout it is not possible via settings, but might be doable via custom code.

Try adding this code to the functions.php file in your theme/child theme directory – make sure to have a full server back-up first for safety. For more details you can check the safe coding guidelines.

add_filter( 'asp_query_args', 'asp_change_tag_logic_filters', 10, 2 );
function asp_change_tag_logic_filters( $args, $id ) {
  foreach ( $args['post_tax_filter'] as $fk => &$fv ) {
	if ( $fv['taxonomy'] == 'post_tag' ) {
		$fv['logic'] = 'AND';
		$fv['_post_tags_empty'] = false;
	}
  }
  return $args;
}