Questions & Answers about Xe máy rung khi chạy.
Vietnamese does not use articles the way English does. A bare noun like xe máy can mean:
- a motorbike
- the motorbike
- motorbikes in general
The exact meaning depends on context. So Xe máy rung khi chạy is natural without any article.
Classifiers are not always required. A classifier such as chiếc is usually used when you are counting something or pointing it out more specifically, for example:
- một chiếc xe máy = one motorbike
- chiếc xe máy này = this motorbike
In a plain statement like Xe máy rung khi chạy, the bare noun xe máy is perfectly normal.