T?ng quan và h??ng d?n chuyên m?c v??Vi?t NamB?n m?u:SHORTDESC:T?ng quan và h??ng d?n chuyên m?c v??Vi?t Nam[one hundred ten] Numerous European attempts to establish buying and selling posts in Vietnam unsuccessful, but missionaries had been allowed to work for a while until eventually the mandarins commenced concluding that Christianity (which