$q->whereNotIn('order_stage_id',[99,4])
->orWhere(function($query) {
            $query->whereNotIn('order_stage_id',[99,4])
            ->orWhere('reference_number', 'like', '%'.$request->key.'%')
            ->orWhere('seller_remark', 'like', '%'.$request->key.'%')
            ->orWhere('companies.name', 'like', '%'.$request->key.'%')
            ->orWhere('users.name', 'like', '%'.$request->key.'%');
          });