title: Display multiple values in a select, one item by one item
body: <p>I have the following json syntax:</p>
  
  <pre><code>{
      "count": 90,
      "results": [
       {
           "tra_keywords": [
               "car",
               "plane",
               "Bike",
               "boat"
               ],
           "tra_title": "Jack"
       },
       {
           "tra_keywords": [
               "blue",
               "red",
               "green",
               "silver"
               ],
           "tra_title": "Averell"
       },
       {
           "tra_keywords": [
               "square",
               "column",
               "square",
               "line"
           "tra_title": "Joe"
       }
       ]
  </code></pre>
  
  <p>}</p>
  
  <p>I would like to display all my tra_keywords in a select.
  I use this:</p>
  
  <pre><code>&lt;select class="form-control" id="rechercheKeywords" ng-model="rechercheKeywords" ng-options="resultats.tra_keywords for resultats in resultatsJSON.results"&gt;&lt;/select&gt;
  </code></pre>
  
  <p>It works but my select display all my keywords in the field. Select display is:</p>
  
  <pre><code>first option:     car,plane,Bike,boat
  second option:    blue,red,green,silver
  ...               square,column,square,line
  </code></pre>
  
  <p>I would like to have this one by one. Select display i would like:</p>
  
  <pre><code>first option:      car
  second option:     plane
  ...                Bike
                     boat
                     blue
                     red
                     green
                     silver
                     square
                     column
                     line
  </code></pre>
  
  <p>How can i do that ? I think my ng-options is incorrect. Thanks</p>
  
  <p>I receive my data with:</p>
  
  <pre><code>myApp.controller("myappCtrl",   ['$scope','$http',function($scope,$http) {
     $http.get('../testANGULAR/json/flux.json')
       .success(function(data){
        scope.resultatsJSON=data;
  })....
  </code></pre>