Created audio is not speaking correctly

[zub03]

if dialogue line is long it misses some words or abruptly speak end word.
I am using multi language like giving it two different language text in single line.
$"Chào! Tôi là {npcName} Tên bạn là gì Hi! I am {npcName} What is your name?"
like this.
so in my case it speaks like Chào! Tôi là {npcName} Tên bạn and some times it say hi and finish talking or sometimes it says Chào! Tôi là {npcName} Tên bạn you name.
Can you tell me what is the real issue.