there's no equivalent of the impersonal pronoun it in VNmese. it's sort of implied. a little like the Spanish "no es intencionado."
semantically speaking, I think it could mean the same. syntactically speaking, I'm not so sure. strictly speaking, I would translate "it's unintentional" as "là vô tình" instead of "không phải là cố tình". now, it's all up to the contributors to add your answer, or refuse it.