hanoi telephone call u.s. president-elect donald trump tell vietnam prime minister want strengthen fast-warming tie two countries government southeast asian nation say thursday vietnam advance tie unite state new level obama administration face communist neighbor china challenge territorial claim busy waterway south china sea wednesday conversation vietnamese premier nguyen xuan phuc congratulate trump election win stress importance maintain friendship cooperation president-elect trump speak highly achievements vietnam well positive developments bilateral tie vietnam government say news website also assert wish cooperate vietnam accelerate relationship two countries trump conversations several leaders countries lock maritime dispute china among japan philippines taiwan trade platform run counter vietnam interest however opposition trans-pacific partnership prove major setback southeast asia big exporter unite state trump phuc discuss ways promote economic tie trade investment government add statement trump transition team confirm conversation say two men discuss range share interest agree work together continue strengthen relationship two nations days trump win phuc tell parliament ratification tpp would shelve political change unite state vietnam still want good relations washington separate development u.s. guided-missile destroyer mustin visit cam ranh international port thursday routine technical stop u.s. embassy say ship visit example depth comprehensive partnership importance strengthen civilian military tie say u.s. ambassador ted osius vietnam express support unite state maintain security presence asia washington fully lift u.s. lethal arm embargo vietnam may allow close defense link joint military exercise trump tell vietnam prime minister hop tie grow strong