The term "doc chuyen nguoi lon" is likely a typographic corruption of “??c truy?n Ng??i L?n,” a Vietnamese term that roughly translates to “adult stories” or the imperative “get adult stories.” This term indicates written material that is erotic in nature and can be categorized as “pulp” pornography.
This term serves as a marketing device to draw attention to websites that feature adult-oriented novels and erotic stories, which range from relatively soft-core to graphic in nature. As of 2015, pornography remains illegal in Vietnam, and the government aggressively censors all forms of media that enter the country, giving rise to a large underground market and a number of websites that feature adult content.