Complex sentence: Vietnam relations improved in August 1995, when both nations upgraded their Liaison Offices opened during January 1995 to Embassy status, with the United States later opening a consulate general in Ho Chi Minh City, and Vietnam opening a consulate in San Francisco.
Split into simpler sentences: Vietnam relations improved in August 1995, both nations upgraded their Liaison Offices opened during January 1995 to embassy status. As diplomatic ties between the nations grew, the United States opened a consulate general in Ho Chi Minh City, and Vietnam opened a consulate in San Francisco.