New Delhi: Prime Minister Narendra Modi sets off on Friday on a bilateral visit to Vietnam and to attend the annual summit of powerful G-20 grouping in China’s Hangzhou where India is likely to seek concrete measures to check terror financing and crackdown on tax evasion. PM Modi in a file image. Modi’s first destination will be Vietnam from where he will leave for Hangzhou on September 3 to attend the G-20 summit on September 4 and 5....