<English> : Actually it was a very hard challenge .
<Vietnamese> : Thực tế đó là một thử thách khó .

<English> : And it was difficult . It was awfully hard .
<Vietnamese> : Và điều đó thực sự khó khăn , rất gian nan .

<English> : It was pretty hard .
<Vietnamese> : 
Nó khá là khó khăn .