Align on small screen

Hello, how can I align the buttons and the pagination to the center of the screen? I have tried this (and many other configuration, but I can not get it to align)

    dom: 
        "<'row'<'col-sm-12'B>>" +
        "<'row'<'col-sm-12'f>>" +
        "<'row'<'col-sm-12'tr>>" +
        "<'row'<'col-sm-12'l>>" +
        "<'row'<'col-sm-12'p>>",

Raffe