The death of a Vietnamese woman in Daegu after she reportedly tried to evade a South Korean immigration raid has intensified scrutiny on the country’s restrictive work visa rules for international students who graduate from local universities. Tu Anh, 25, died after falling three stories from an air-conditioning unit of a car parts factory where she had been working illegally, according to the Hankyoreh newspaper. She had hidden behind the unit as immigration officers cracked down on...