Kiên Trịnh is an eclectic artist whose music portfolio showcases a diverse array of sounds and themes, ranging from the deeply nostalgic to the vibrantly contemporary. His compositions, often rich in lyrical depth and musical complexity, invite listeners into a world where traditional Vietnamese elements seamlessly blend with modern music sensibilities. Tracks like "Diễm Xưa" and "Quán Cơm Ngày Mưa" evoke a sense of timeless beauty and melancholy, reflecting on themes of love, loss, and the ephemeral nature of life. Meanwhile, songs such as "Thế Kỷ 21 Buồn" and "Một Ngày" capture the nuances of modern-day existentialism and the search for meaning in the fast-paced 21st century.

Not shy to explore and experiment, Kiên Trịnh has also ventured into more upbeat and whimsical territories with tracks like "Starry Night" and "Tập Thể Dục," showcasing his versatility as a musician and his ability to connect with a broader audience. With "Bên Trái" and "Không Qua Loa 8," he delves into introspective and philosophical musings, wrapped in his signature melodic and often melancholic sound. Through his music, Kiên Trịnh occupies a unique niche in the Vietnamese music scene, bridging the gap between traditional cultural expressions and contemporary musical innovation, making him a beloved figure among listeners spanning various generations and musical preferences.