According to date:
25a China, Vietnam to Settle Tonkin Border Dispute
25 China, Vietnam Finally Resolve Disputed Tonkin Gulf Border
26 China, Vietnam Sidestep Thorny Spratly Dispute
26a China, Hosting Vietnam President, Restates Claim to Disputed Islands
28 Vietnam reaffirms claim on disputed Spratly and Paracel islands
28a Vietnam: Cam Ranh Bay Manoeuvres