Okay, the user wants me to translate "horse-cart" into Vietnamese. Let me check the rules again. The first rule says to translate all content into Vietnamese. The second rule states that if the content is already in Vietnamese, leave it unchanged. The third rule is to provide only the translation without explanations.
So, "horse-cart" is an English term. I need to translate it. In Vietnamese, a horse-cart is typically referred to as "xe ngựa" or "xe kéo ngựa." Let me confirm which term is more commonly used. "Xe ngựa" is straightforward and directly translates to "horse cart." "Xe kéo ngựa" might be more literal, meaning "horse-pulled cart," but both are correct. However, "xe ngựa" is the more standard term. I should go with that. The user didn't specify any particular context, so the general translation should suffice. No need for explanations, just the translation. Alright, the answer is "xe ngựa."