JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script>
<div class="container">
    <div class="row">
        <div class="col-lg-7 col-md-7 col-sm-7 col-xs-12">column left</div>
        <div class="col-lg-5 col-md-5 col-sm-5 col-xs-12 col-right">
            <div>Column right nro 1</div>
            <div>Column right nro 2</div>
        </div>
    </div>
</div>

CSS

@media (max-width: 768px) {
    .col-right {
        display: table;
    }
    .col-right > div:nth-child(2) {
        display: table-caption;
        margin: 0 15px;
    }
}