Hi Chi. Die^~m, The^' ma^'y chu' Su+' thi` sao ? Sao chi. da'm cha('c to^i kho^ng pha?i la` NCS/DHS. Ma^'y anh ddang la`m postdoc hay visiting thi` go.i la` gi` he`. Chi. cho to^i la`m oversea Vnmese nghe cu~ng oai, nhu+ng ddi la.i xin visa kho^? la('m chi. o+i. Co' tie^'ng cha(?ng co' mie^'ng. Cheers Aiviet