"Trách nhiệm duy nhất của chúng tôi là xây dựng hoà bình."

Translation: Our only responsibility is to build peace.

[tay_loree]

The voice is saying the beginning of this sentence way too fast

[JeanPredie]

unique should be accepted

[Seth853809]

Even knowing what he saying and listening many times, it doesn't seem like he is saying nhiệm intelligibly.