Hanoi [Vietnam], August 11 (ANI): Chinese drones were detected in Vietnamese airspace twice recently, experts say the move by China was a response to increased collaboration between the forces of Vietnam and the Philippines, The Voice of America reported. Incidentally, these drone interventions by China came within a week of the joint Coast Guard training exercises organised by Vietnam and the Philippines. The first of these Chinese drone sightings occurred on August 2 and the second one was witnessed on August 7 when the Philippines naval commander was in a meeting with his counterpart in Han…