No common subject found between articles

The provided articles cover two unrelated topics. One article discusses Vietnamese actress Ngo Thanh Van sharing moments of her one-year-old daughter, Gao, learning to speak and starting preschool.

The second article profiles Ho Ngoc Han, the first student from Quoc Hoc Hue High School to win the Đường Lên Đỉnh Olympia competition in 2009. It details his academic achievements, including becoming a university valedictorian and his decision to return to Vietnam to pursue a career in science.