diff --git a/src/Builders/FilterBuilder.php b/src/Builders/FilterBuilder.php
index f185eb7..dbd83cb 100644
--- a/src/Builders/FilterBuilder.php
+++ b/src/Builders/FilterBuilder.php
@@ -16,6 +16,18 @@ class FilterBuilder extends Builder
     public $wheres = [
         'must' => [],
         'must_not' => [],
+        'should' => [],
+    ];
+
+
+    /**
+     * The condition array.
+     *
+     * @var array
+     */
+    public $functionScore = [
+        'query' => [],
+        'functions' => [],
     ];
 
     /**
@@ -341,6 +353,42 @@ public function whereGeoBoundingBox($field, array $value)
         return $this;
     }
 
+    /**
+     * Add a whereShould condition.
+     *
+     * @see https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-geo-bounding-box-query.html Geo bounding box query
+     *
+     * @param string $field
+     * @param $value
+     * @return $this
+     */
+    public function whereShould($field, $value)
+    {
+        $this->wheres['should'][] = [
+            'match' => [
+                $field => $value
+            ],
+        ];
+
+        return $this;
+    }
+
+
+    /**
+     * Add a function scroe query
+     *
+     * @see https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-geo-bounding-box-query.html Geo bounding box query
+     *
+     * @param array $value
+     * @return $this
+     */
+    public function whereFunctionScore($value)
+    {
+        $this->functionScore['functions'][] = $value;
+
+        return $this;
+    }
+
     /**
      * Add a whereGeoPolygon condition.
      *
@@ -401,6 +449,18 @@ public function orderBy($field, $direction = 'asc')
         return $this;
     }
 
+    /**
+     * Add complex sort array.
+     * @param array $sort
+     * @return $this
+     */
+    public function sort($sort)
+    {
+        $this->orders[] = $sort;
+
+        return $this;
+    }
+
     /**
      * Explain the request.
      *
diff --git a/src/ElasticEngine.php b/src/ElasticEngine.php
index b373cb7..008f267 100644
--- a/src/ElasticEngine.php
+++ b/src/ElasticEngine.php
@@ -106,13 +106,21 @@ public function buildSearchQueryPayloadCollection(Builder $builder, array $optio
                 $payload = new TypePayload($builder->model);
 
                 if (is_callable($rule)) {
-                    $payload->setIfNotEmpty('body.query.bool', call_user_func($rule, $builder));
+                    if(count($builder->functionScore['functions']) === 0){
+                        $payload->setIfNotEmpty('body.query.bool', call_user_func($rule, $builder));
+                    }else{
+                        $payload->setIfNotEmpty('body.query', []);
+                    }
                 } else {
                     /** @var SearchRule $ruleEntity */
                     $ruleEntity = new $rule($builder);
 
                     if ($ruleEntity->isApplicable()) {
-                        $payload->setIfNotEmpty('body.query.bool', $ruleEntity->buildQueryPayload());
+                        if(count($builder->functionScore['functions']) === 0){
+                            $payload->setIfNotEmpty('body.query.bool', $ruleEntity->buildQueryPayload());
+                        }else{
+                            $payload->setIfNotEmpty('body.query', []);
+                        }
 
                         if ($options['highlight'] ?? true) {
                             $payload->setIfNotEmpty('body.highlight', $ruleEntity->buildHighlightPayload());
@@ -125,8 +133,13 @@ public function buildSearchQueryPayloadCollection(Builder $builder, array $optio
                 $payloadCollection->push($payload);
             }
         } else {
-            $payload = (new TypePayload($builder->model))
-                ->setIfNotEmpty('body.query.bool.must.match_all', new stdClass());
+            if(count($builder->functionScore['functions']) === 0){
+                $payload = (new TypePayload($builder->model))
+                    ->setIfNotEmpty('body.query.bool.must.match_all', new stdClass());
+            }else{
+                $payload = (new TypePayload($builder->model))
+                    ->setIfNotEmpty('body.query', []);
+            }
 
             $payloadCollection->push($payload);
         }
@@ -141,17 +154,33 @@ public function buildSearchQueryPayloadCollection(Builder $builder, array $optio
                 ->setIfNotNull('body.from', $builder->offset)
                 ->setIfNotNull('body.size', $builder->limit);
 
-            foreach ($builder->wheres as $clause => $filters) {
-                $clauseKey = 'body.query.bool.filter.bool.'.$clause;
+            if(count($builder->functionScore['functions']) > 0){
+                $payload->setIfNotEmpty('body.query.function_score', $builder->functionScore);
+                foreach ($builder->wheres as $clause => $filters) {
+                    $clauseKey = 'body.query.function_score.query.bool.'.$clause;
 
-                $clauseValue = array_merge(
-                    $payload->get($clauseKey, []),
-                    $filters
-                );
+                    $clauseValue = array_merge(
+                        $payload->get($clauseKey, []),
+                        $filters
+                    );
+
+                    $payload->setIfNotEmpty($clauseKey, $clauseValue);
+                }
+            }
+            else{
+                foreach ($builder->wheres as $clause => $filters) {
+                    $clauseKey = 'body.query.bool.filter.bool.'.$clause;
+
+                    $clauseValue = array_merge(
+                        $payload->get($clauseKey, []),
+                        $filters
+                    );
 
-                $payload->setIfNotEmpty($clauseKey, $clauseValue);
+                    $payload->setIfNotEmpty($clauseKey, $clauseValue);
+                }
             }
 
+
             return $payload->get();
         });
     }
@@ -325,6 +354,10 @@ public function map(Builder $builder, $results, $model)
                         $model->highlight = new Highlight($hit['highlight']);
                     }
 
+                    if (isset($hit['sort'])) {
+                        $model->sort = $hit['sort'];
+                    }
+
                     return $model;
                 }
             })