$testimonials = $this->getCollection()
                ->setOrder('testimony_order', 'ASC')
                ->setPageSize(20)
                ->setCurPage($page)
                ->addFieldToFilter('test_type', array('like' => "% " . $filters . " %"))
                ->addExpressionFieldToSelect('test_type', 'CONCAT(" ",{{testimony_type}}," ")', 'testimony_type')
                ->load();