You are learning ordering more: you will read the scene it happens in, take apart the pattern behind them (thêm + ordering vocabulary), hear them in a conversation, rehearse them, and finish by saying one thing out loud to be graded.
A Hanoi quán ăn (casual restaurant). The food is so good that one portion isn't enough. Ordering more, the communal table, and the pay-fight ritual.
The stranger has joined his guesthouse owner, Minh, for bún bò Huế — spicy beef noodle soup: crimson broth, thick round noodles, lemongrass, shrimp paste. The color alone is alarming. The smell is extraordinary.
They finish. Minh waves at the owner. 「Thêm hai bát nữa nhé!」 Two more. The stranger starts to protest — but the bowls arrive before he can speak, and the smell changes his mind.
「Hôm nay tôi mời!」 Minh says. The stranger protests twice. Minh insists. On the third insistence: 「Được rồi! Cảm ơn! Lần sau tôi mời!」 The protocol complete.