extended tax query realtionship and nesting

taxquery.php

@@ -2,30 +2,41 @@
 /**
  * Template Name: Tax Query Example
  */
-
 $philosophy_query_args = array(
-	'post_type'=>'book',
-	'post_per_page'=>-1,
-	'tax_query'=>array(
-		'relation'=>'AND',
+	'post_type'      => 'book',
+	'posts_per_page' => - 1,
+	'tax_query'      => array(
+		'relation' => 'AND',
 		array(
-			'taxonomy'=>'language',
-			'field'=>'slug',
-			'terms'=>['english'],
+			'relation' => 'AND',
+			array(
+				'taxonomy' => 'language',
+				'field'    => 'slug',
+				'terms'    => array( 'english' )
+			),
+			array(
+				'taxonomy' => 'language',
+				'field'    => 'slug',
+				'terms'    => array( 'arabic' ),
+				'operator' => "NOT IN"
+			)
 		),
 		array(
-			'taxonomy'=>'language',
-			'field'=>'slug',
-			'terms'=>['bangla'],
-			'operator'=>'NOT IN'
-		)
-	),
+			'taxonomy' => 'genre',
+			'field'    => 'slug',
+			'terms'    => array( 'history' )
+		),
+
+
+	)
 );
 
-$philosophy_query_posts = New WP_Query($philosophy_query_args);
-while ($philosophy_query_posts->have_posts()){
-	$philosophy_query_posts->the_post();
+$philosophy_posts = new WP_Query( $philosophy_query_args );
+//echo $philosophy_posts->found_posts;
+
+while ( $philosophy_posts->have_posts() ) {
+	$philosophy_posts->the_post();
 	the_title();
-	echo '<br/>';
+	echo "<br/>";
 }
 wp_reset_query();