Bootstrap align horizontal - html

Question

How can I have all align horizontal the below code renders as shown in the screen 1 and but I'm trying to have as shown in screen 2
<div class="row">
<div class="col-xs-6">
<div class="row">
<div class="col-xs-3">
<label for="inputEmail3" class="col-sm-4 control-label">Number</label>
</div>
<div class="col-xs-3">
<input type="text" id="number"></input>
</div>
<div class="col-xs-3">
</div>
</div>
</div>
<div class="col-xs-6">
<div class="row">
<div class="col-xs-3">
<label for="inputEmail3" class="col-sm-4 control-label">Tag</label>
</div>
<div class="col-xs-3">
<input type="text" id="Name"></input>
</div>
<div class="col-xs-3">
<button class="btn btn-default" type="button">Go!</button>
</div>
</div>
</div>
Screen shot 1:
Screen shot 2:

Answer 1

Your HTML structure is incorrect; you're nesting columns and rows and then columns inside columns for no reason. Docs
See example.
(*The columns are XS as in your example which in this case will not render very well from a mobile screen, consider using SM)
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" />
<div class="container">
<div class="row">
<form class="myForm">
<div class="form-group">
<label for="Number" class="col-xs-2 control-label">Number</label>
<div class="col-xs-4">
<input type="text" class="form-control" id="Number" />
</div>
</div>
<div class="form-group">
<label for="tag" class="col-xs-2 control-label">Tag</label>
<div class="col-xs-4">
<div class="input-group">
<input type="email" class="form-control" id="tag" /> <span class="input-group-btn">
<button class="btn btn-default" type="button">Go!</button>
</span>
</div>
</div>
</div>
</form>
</div>
</div>