Last Bootstrap工具提示不起作用

This is my HTML code:

这是我的HTML代码:

<table>
    <tr class="primary">
        <td>1</td>
        <td>Name</td>
        <td>
            <a data-toogle="tooltip" data-placement="bottom" title="Add user" href="/go.html?url=#/tutoria/add/1" class="glyphicon glyphicon-plus glyphicon-lg **tooltips** add-user" data-original-title="Agregar usuario"></a> 
        </td>
    </tr>
    <--!The last tooltip that I've in my table (tr) doesn't work-->
    <tr class="primary">
        <td>2</td>
        <td>Name</td>
        <td>
            <a data-toogle="tooltip" data-placement="bottom" title="Add user" href="/go.html?url=#/tutoria/add/2" class="glyphicon glyphicon-plus glyphicon-lg **tooltips** add-user"></a> 
        </td>
    </tr>
</table>
<table>