/ɪˈliːɡəl ˈtrɛɪd/ – Phrase
Definition: 1. buôn bán bất hợp pháp, buôn bán hàng cấm;
2. buôn lậu.
A more thorough explanation: Illegal trade, also known as illicit trade, refers to the buying, selling, or exchange of goods or services that is conducted in violation of laws and regulations. This type of trade often involves activities such as smuggling, counterfeiting, piracy, and other forms of criminal behavior that undermine legal markets and pose risks to public safety, health, and security.
Example: The authorities cracked down on the illegal trade of counterfeit goods in the city.