Search and rescue teams continued searching for 17 missing sailors on Sunday after a Vietnamese cargo vessel sank in the South China Sea, Chinese state media reported.The Khoi Nguyen 18 had 62 crew members on board when it ran into difficulty and sank near Fiery Cross Reef in the Spratly Islands on Saturday evening.As of Sunday afternoon, 45 survivors had been rescued and the search for the others was continuing, state broadcaster CCTV reported. All those on board were Vietnamese...