Hanoi, May 3 -- Vietnam has made demarches and sent diplomatic notes to the countries concerned to protest their violations of Vietnam's sovereignty over Hoai An reef and other related features in the Truong Sa (Spratly), spokesperson of the Ministry of Foreign Affairs Pham Thu Hang said on May 3. In reply to reporters' question about Vietnam's reaction to the activities of China and the Philippines in Hoai An Reef, Tri Le Reef and Cai Vung Reef in the Truong Sa, Hang reiterated that as repeatedly affirmed, Vietnam has full legal basis and historical evidence to assert its sovereignty over the Truong Sa, in accordance with international law as wel as sovereignty, sovereign rights and jurisdiction over maritime zones established following ...