The song "Liệu Em Có Quay Về" by Tễu is about longing and hope for a lost love to return. The lyrics describe the feeling of being left behind, with the singer wondering where their love has gone. They express their sadness and desire for the one they love to come back. The song talks about the passage of time and the pain of longing for the return of the beloved. The singer questions whether their love will ever come back, expressing a mix of uncertainty and hope. They also reflect on the beauty of their love and how they believe that their beloved will eventually return. Overall, the song conveys the feeling of longing, waiting, and hoping for a lost love to come back, while expressing the pain and uncertainty of the situation.