'Searched' in the Bible

The heart is a twisted thing, not to be searched out by man: who is able to have knowledge of it?

This is what the Lord has said: If the heavens on high may be measured, and the bases of the earth searched out, then I will give up the seed of Israel, because of all they have done, says the Lord.

They will be cutting down her woods, for they may not be searched out; because they are like locusts, more than may be numbered.

I have had Esau searched out, uncovering his secret places, so that he may not keep himself covered: his seed is wasted and has come to an end, and there is no help from his neighbours.