After more than 10 days of release, "Detective Kien: Ky an Khong mat" achieved a revenue of more than 177 billion VND.
In addition to the plot, the audience also paid attention to the song that echoed at the end of the film. This song is called "Loi hen", composed and performed by Phan Manh Quynh.
This is the third time Phan Manh Quynh has written pen for songs about Victor Vu's character in a film.
In 2018, Phan Manh Quynh sang a film soundtrack for the first time. He composed the song "Ngay xua cong tuong" and the soundtrack for Victor Vu's movie "Nguoi bat tu".
This song is considered a milestone in the careers of both musicians and singers, becoming a hit that many Vietnamese singers performed and mixed.
The song conquered the audience with its passionate, deep melody and beautiful lyrics: "va anh nang em nhu hoa/ And anh xem anh nhu trang ngua ngua/ Thuong lai nhu cong cong cong cong tinh ta tinh ngan/ No matter how vast the world is, where you are, it is home".
In 2019, Phan Manh Quynh continued to collaborate with Victor Vu. He wrote all 4 songs for the movie " Mat Biec" including "Co trai viet len cay", "Tu di", "Toi chi muon noi", "Nha Lan".
In particular, "Co trai viet len cay" also caused a stir, winning the Most Favorite Film Music award at the 2019 Lan Song Xanh Awards.

Not only has a close relationship with Victor Vu, Phan Manh Quynh also has the chance to write soundtracks for Tran Thanh's projects.
In 2021, Phan Manh Quynh composed and performed the song "Sao cha khong" in the movie "Bo gia" by Tran Thanh. The film earned 427 billion VND, becoming the highest-grossing Vietnamese film at that time.
The song "Sao cha khong" was also well received, helping Phan Manh Quynh affirm his position as one of the "hand-carried" film music composers of Vietnamese showbiz.
In 2023, Phan Manh Quynh had his next hit song "Sau thuy tu cong". The song that resounded at the end of the movie "Mai" became a famous excerpt, discussed on all forums.
"Mai" achieved a revenue of 550 billion worldwide, becoming the most successful Vietnamese film of all time, helping Tran Thanh become a trillion-dong director of Vietnamese cinema. In particular, "Sau thu from khuc" also contributed to spreading the story of the movie "Mai".

Phan Manh Quynh was born in 1990, from Nghe An. From 2009 to 2014, Phan Manh Quynh was the author of many hit songs such as "Nguoi tinh cu" (Khoi My), "Minh tung yeu nhau" (Miu Le), "Anh thien va em" (Huong Tram).
In 2015, he wrote the song " nguoi ta nuoi", reaching more than 100 million views, then released many songs such as "Tri ky", "di di khoi do ai di", "Khi ai luong ta cua"...
At the end of 2024, he released his debut album CineLove, then held a 10-year singing concert.