better luck next time 祝你下次好运；下次运气更好；下次一定会走运的；希望下次运气好一些（常用来在别人失败时表示鼓励和安慰）

【例句】
I was very sorry to hear that you were unsuccessful in your examination. I wish you better luck next time.
听说你考试没过，我深为惋惜，祝你下次好运。

Ah well, better luck next time.
好啦好啦，祝你下次运气好一些。