Cảm ơn rất nhiều is an everyday Vietnamese phrase for expressing strong gratitude, built from cảm ơn for thank you and rất nhiều for very much. Online, short voice clips of familiar polite phrases are shared as reaction sounds because they carry tone that written thanks often miss. This version circulates on user generated soundboards with other short Vietnamese phrases, and creators reuse it across edits, streams and chats whenever a sincere thank you fits the moment better than an English clip or a generic applause effect.