Magento多店 - 展示所有商店的产品

I've just set up a Magento multi-store, and I'm trying to figure out how to display products from those 3 stores in my homepage. Problem is that my code is only showing the posts from the current store. ex: store (1) shows products of store (1) store (2) shows products of store (2) but I don't need it that way. I need all products from all storesI've just set up a Magento multi-store, and I'm