Given the task definition and input, reply with output. Given a sentence in Vietnamese, generate a new Vietnamese sentence by performing small changes on the sentence. Here, make sure that the changes are semantically related and syntactically similar to the input. And the generated sentence should have high commonsense plausibility, that is to have reasonable probability of it being true.

Nếu bạn muốn bị căng thẳng thì bạn nên mua thức ăn.

Nếu bạn nghỉ để ăn trưa sau đó bạn nên mua thực phẩm.