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.

39B. Bún Thịt Cay Chả Giò - Spicy Beef and Egg Roll With Noodles
43. Bún Tôm Nướng - Grilled Shrimp With Noodles 

