select * from xx where (a = 22 or b = 333) or (c=11 and d=22)

$where_1['a'] = array('eq', '222');

$where_2['b'] = array('eq','333');

$where_3['c'] = 11;

$where_4['d'] = 22;

$map['_complex'][] = [

      $where_1,$where_2,

      '_logic'=>'or',

  ];

$map['_complex'][] = [

      $where_3,$where_4,

      '_logic'=>'or',

];

$this->where($map)->select();