Laos Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Vietnam was US$42.4 Thousand during 2015, according to the United Nations COMTRADE database on international trade. Laos Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Vietnam - data, historical chart and statistics - was last updated on May of 2024.