Adjusting the bootstrap columns just to fit the text within them may seem unnecessary. If you simply need some spacing similar to hitting the enter key, you can achieve that by inserting the <br>
element right after "Lorem".
<div class="col-md-4">...</div>
<div class="col-md-4">...</div>
<div class="col-md-4">Lorem <br> Ipsum</div>
UPDATE: After reviewing your query, it appears you might have been looking for a way to add space specifically on mobile devices but not on desktops. To achieve this, you could use a br class that is only visible on xs (extra small) and sm (small) screen sizes. You can always include more classes as needed, but these two should cover most mobile scenarios.
<div class="col-md-4">...</div>
<div class="col-md-4">...</div>
<div class="col-md-4">Lorem <br class = "visible-xs visible-sm"> Ipsum</div>