I've hunted everywhere but I can't find it.

我到处都搜遍了，就是找不到它。

《牛津词典》

I've had a good look for it, but I can't find it.

我仔细找过了，可是找不着。

《牛津词典》

Where is it? I can't find it.

它在哪里？我找不到它。

youdao

Come get me one later if you can't find it.

如果你没找到的话课下再来找我要一个吧。

麻省理工公开课 - 计算机科学及编程导论课程节选

I've been looking for something similar to it, but I can't find a place that sells it here.

我一直在找像这样的一条裙子，但是我没找到哪里有卖。

Where 实战 - SpeakingMax英语口语达人

I can't find it.

我找不到这答案。

耶鲁公开课 - 死亡课程节选

"If people don't know there is content there, and they can't find it, that raises huge citizenship questions, " she said.

BBC: NEWS | UK | Wales | Wales head of digital TV league

If you can't find it, get someone else to help you look.

NPR: Excerpt: 'Delivered from Distraction'

It puts the fix for any problem on its website, it's our fault if we don't know about it, can't find it or fail to understand it.

CNN: ASIANOW - Asiaweek | Intelligence | Technology: Bill and the BubbleBoy