Change the button to add it to your cart when it is more than 1 combination

[siminkuv]

Hello, I am using Prestashop 1.7.5, I would like to change the button in the product.tpl (thumbnail) to add to the cart after the button to see the detail (I set it up). How can I make a condition to see this other button when I have more than one combination. {if count ($ combination)> 1} does not work :( Thank you