Multiple Keyword in search

Hi, I am creating a search form but I have a problem, when I search for two keywords together "Key Keyword" returns me no results.


Controller:

PHP Code:

$keyword = esc($this->request->getVar('key'));

$builder = $this->db->table('mytable');
$builder->like('first_name', $keyword);
$builder->orLike('last_name', $keyword);
$builder->orLike('bio', $keyword);
$builder->groupBy("id");

$query = $builder->get();
$q = $query->getResultArray();
        
$data['search'] = $q; 


With a keyword it works, it shows the results but unfortunately by inserting more than one it shows nothing. 
I pass the data into GET.

My routes:

PHP Code:

$routes->get('search', 'Auth::search');