HANOI: US President Joe Biden arrives in Vietnam on Sunday to deepen cooperation between the two nations, in the face of China's growing ambitions in the region.Biden -- who is flying from the G20 summit in New Delhi -- will meet the leader of Vietnam's ruling Communist Party, Nguyen Phu Trong, on Sunday, and is expected to sign off on a "comprehensive strategic partnership", Hanoi's highest level of diplomatic ties.The underlying goal of the short visit will be much the same as Biden's time at the G20 gathering...