Thịt nướng litererally means baked or barbecued meat and in this case it’s traditionally barbecued, and the meat is always pork. You could probably do this with beef or chicken if you prefer and it would work too.
Bún (pronounced like boon) means noodles, and for this dish it’s a rice vermicelli noodle which is sold in small packages as dried rice sticks.

39C. Bún Thịt Cay Tôm - Spicy Beef And Grilled Shrimp With Noodles
47. Bún Chả Giò Chay - Fried Tofu & Vegetable Egg Rolls With Noodles
45. Bún Thịt Nướng Chả Giò - Grilled Pork & Egg Rolls With Noodles 

