"Hạnh Phúc Không Trân Trọng" by Tín Khang is a Vietnamese song that talks about the regret and realization of not appreciating happiness when it was present. The lyrics describe a relationship where one person (presumably the singer) didn't value the love and happiness they had with their partner. The singer acknowledges their mistakes and expresses remorse for not cherishing the relationship when they had the chance. The song also touches on themes of forgiveness, redemption, and hope for a second chance. The singer begs for forgiveness and expresses a desire to make things right and be a better partner in the future. The lyrics convey a sense of longing, regret, and a willingness to change and improve for the sake of love. Overall, "Hạnh Phúc Không Trân Trọng" is a heartfelt and emotional song that explores themes of love, regret, and the importance of appreciating the happiness we have in our lives. The singer reflects on their past mistakes and expresses a deep longing for a second chance at love and happiness.