I don't know why you couldn't find it—it's right here under your nose.我不明白你为何找不到——它就在你眼皮底下

They were embezzling funds right under his nose.他们在他眼皮底下盗用资金。

The answer was right under our noses [=the answer was very obvious] the whole time.答案自始至终都非常明显。