“Cậu Bé Karate Thuyết Minh” refers to the Vietnamese voice-over version of The Karate Kid (often the 2010 remake starring Jaden Smith and Jackie Chan, or the original 1984 film). In Vietnam, “thuyết minh” means a narrated translation where one voice actor speaks all parts over the original audio.
If you need a for "Cậu Bé Karate Thuyết Minh" (e.g., for a blog, DVD cover, or video description), here’s a suggestion in Vietnamese (since the title is Vietnamese): Giới thiệu phim "Cậu Bé Karate" (bản thuyết minh) Cau Be Karate Thuyet Minh
It sounds like you’re referring to — which likely means The Karate Kid (or a similar martial arts film) as narrated or voice-overed in Vietnamese (thuyết minh). “Cậu Bé Karate Thuyết Minh” refers to the