Nexis Uni (formerly LexisNexis Academic)
Features more than 15,000 news, business and legal sources, including U.S. Supreme Court decisions dating back to 1790. Exact dates vary by title, but most ca. late 1990s-present. To limit to SouthEast Asian countries, either filter by Geography after the search, or before searching, select Menu, All Sources, the narrow by Jurisdiction.