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

I can't find it.

我找不到这答案。

耶鲁公开课 - 死亡课程节选

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

It's so difficult. I can't find the right car for the right price.

这太难了。我找不到一款价格合适的车。

How can I 实战 - SpeakingMax英语口语达人

But I can't find out who's done it.

BBC: Ricky Reel's family calls for case review 16 years on

So he wrote this piece - and, by the way, if you try to look it up now, you can't because Obama and his team have scrubbed it from the internet, so you can't find it, but I want to share with you part of what he wrote.

CENTERFORSECURITYPOLICY: Monica Crowley, Mightier Pen 2012

Ideally I'd like to replace them with iPod touches and a wireless printer, but I can't seem to find a solution that offers printing -- but it's essential to what we do.

ENGADGET: Ask Engadget: is iPod Touch and Wireless Printer-based credit card processing possible?