It is not possible to natively increase the number of views shown. The number of views can be increased by selecting the More » link at the bottom of the list on the views page.
The Views page () is limited to display only the first 12 shared views and the first 8 personal views. If you want certain views you use frequently to appear higher on the list, you can reorder your views (see Reordering views).
However, you may consider using a third party integration, which can provide a quick overview of any view that does not fit onto the page.