General Query

// WP_Query arguments
$args = array(
	'post_parent'            => '10',
	'post_type'              => array( 'products' ),
	'post_status'            => array( 'pending' ),
	'author'                 => '1',
	's'                      => 'TST',
	'nopaging'               => false,
	'paged'                  => '999999',
	'posts_per_page'         => '10',
	'order'                  => 'ASC',
	'orderby'                => 'title',
	'tax_query'              => array(
		'relation' => 'OR',
		array(
			'taxonomy'         => 'primary',
			'terms'            => '2',
			'field'            => 'term_id',
			'operator'         => 'AND',
			'include_children' => true,
		),
		array(
			'taxonomy'         => 'category',
			'terms'            => 'myCat',
			'field'            => 'name',
		),
		array(
			'taxonomy'         => 'post_tags',
			'terms'            => 'Hello Word',
			'field'            => 'name',
		),
	),
	'meta_query'             => array(
		array(
			'key'     => 'fa_roles',
			'value'   => 'lecturers',
			'type'    => 'BINARY',
		),
	),
	'cache_results'          => true,
	'update_post_meta_cache' => true,
	'update_post_term_cache' => true,
);

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

// The Loop
if ( $query->have_posts() ) {
	while ( $query->have_posts() ) {
		$query->the_post();
		// do something
	}
} else {
	// no posts found
}

// Restore original Post Data
wp_reset_postdata();