That's for snacks. There are imported snack stores on the first floor of the New People's Building and in Wanda
If you're looking for imported food (not just snacks, but also ingredients that you can use to make your own foreign food at home in your kitchen), we recommend going to the Theater of Life (there is a Theater of Life in Causeway Bay Square, just past Gugendai)
If you are looking to buy imported food, we recommend going to the Theater of Life, which is located in the Causeway Bay Plaza. There is a Theater of Life in the Causeway Bay Plaza on the other side of Guggenheim Terrace.