You have no idea. Not a clue.

你怎么知道我最近压力有多大?。

youdao

Still in the dark, not a clue.

不明白， 一点儿都不懂。

youdao

I have not a clue, "said Moshe."

教长说：我也不知道。

youdao

We don't really have a clue yet, or not much of a clue, as to how you could even so much as begin to-- it's not that merely that we don't have the details worked out.

毫无头绪,或者说,无从下手,你如何在这种情形下开个头,我们不只是不知道细节如何

耶鲁公开课 - 死亡课程节选

Consider how dotcom mania showered wealth on every jaunty entrepreneur with the glimmering of an idea but not a clue about earnings.

CNN: ASIANOW - TIME Asia | Is the New Economy Dead?

Not a clue about German.

BBC: Your stories of getting lost

"Had it not turned out the way that it did, I would possibly be working a triple homicide, not having a clue as to who it is we're looking for, " he told CNN.

CNN: STORY HIGHLIGHTS