'Searched' in the Bible

Lo this, we have searched it, so it is; hear it, and know thou it for thy good.

Then did he see it, and declare it; he prepared it, yea, and searched it out.

I was a father to the poor: and the cause which I knew not I searched out.

Behold, I waited for your words; I gave ear to your reasons, whilst ye searched out what to say.

Behold, God is great, and we know him not, neither can the number of his years be searched out.