Okay, the user sent "by-road". Let me check the translation rules again. The first rule is to translate all content into Vietnamese. The second says if it's already in Vietnamese, leave it as is. The third is to provide only the translation without explanations.
So, "by-road" isn't in Vietnamese. I need to translate it. The direct translation of "by-road" into Vietnamese would be "bằng đường bộ". But wait, is there a more natural way to say it? Maybe "theo đường bộ" or "đường bộ" depending on context. However, since the user just provided "by-road" without context, the most literal translation would be "bằng đường bộ". But I should make sure that's the correct term. Let me confirm. "By road" in Vietnamese is often translated as "bằng đường bộ" when referring to transportation or movement via roads. So, "by-road" as an adjective or noun might translate to "đường bộ" or "bằng đường bộ". Since the original is "by-road", which is an adjective, maybe "bằng đường bộ" is more accurate. But I need to stick to the rules and provide the translation as per the user's request. I'll go with "bằng đường bộ".