angularjs checkbox filter of json nested array

Pls help me, i am stucked.

i am learning Angularjs and visited this link http://ift.tt/1Cwo0O3 its very nice example of filtering with checkbox.

But i am not able to filter results with "tags":.

<li>
        <input type="checkbox" value="2" data-ng-model="checkboxData['thing.details.type=2']" id="carType2" />
        <label for="carType2">Type 2</label>
     </li>

Thanks in advance.