Is it necessary to import md-autocomplete in Angular 1.5.8?

This is my first project in AngularJs and I'm trying to create a filter with the md-autocomplete field but nothing appears on my page.

When writing the label I do not appear in suggestions the package md- as if what happens to me with ng- or others. That's why I ask myself, is it necessary to import it before?

My code is as follows:

<div class="col-md-6">
                            <!--<input type="text" id="cliente" ng-model="cliente" class="form-control input-lg" placeholder="Cliente"
                                   ng-click="leftCursor()" ng-change="searchCliente()" /> -->
<md-content class="md-padding" ng-cloak>
<form>
    <md-autocomplete 
                 md-no-cache="ctrl.noCache"
                 md-selected-item="ctrl.selectedItem"
                 md-search-text-change="ctrl.searchTextChange(ctrl.searchText)"
                 md-search-text="ctrl.searchText"
                 md-selected-item-change="ctrl.selectedItemChange(item)"
                 md-items="item in ctrl.querySearch(ctrl.searchText)"
                 md-item-text="item.display"
                 md-min-length="0"
                 placeholder="US State?">
                 <md-item-template>
                 <span md-highlight-text="ctrl.searchText" md-highlight-flags="^i">
                 {{item.display}}
                 </span>
                 </md-item-template>
</md-autocomplete>
</form>
</md-content>