Khanh Hoa, July 2 -- As the central province of Khanh Hoa enters the peak summer tourism season with a sharp rise in visitor arrivals, authorities are stepping up efforts to maintain public order and ensure that foreign visitors comply with Vietnamese law. The coastal ward of Nha Trang is currently bustling with international tourists, while tourism-related services are operating at full capacity. However, public security, temporary residence management and legal compliance among a small number of foreign nationals have remain concerns for local authorities. The province is home to between 80,000 and 83,000 foreign residents at any given time, with the figure occasionally reaching 85,000. Most enter Vietnam for tourism, investment or work...