What you are trying to achieve is overriding the basic premise of Bootstrap. Bootstrap uses the following scaling classes...
lg - For extra large displays md - For standard sized displays such as desktops and laptops sm - For tablet devices and devices with screens around the 7-11 inch range xs - For mobile phones and devices with such small screens
The point of Bootstrap is to create a website style which will adjust itself based on the screen size automatically. You can use the md scaling class and if a smaller device is used then the elements will be collapsed and stacked on top of one another.