'Searching' in the Bible

And I gave my heart to searching out in wisdom all things which are done under heaven: it is a hard thing which God has put on the sons of men to do.

I gave my mind to knowledge and to searching for wisdom and the reason of things, and to the discovery that sin is foolish, and that to be foolish is to be without one's senses.

For which my soul is still searching, but I have it not; one man among a thousand have I seen; but a woman among all these I have not seen.

This only have I seen, that God made men upright, but they have been searching out all sorts of inventions.

And because the Preacher was wise he still gave the people knowledge; searching out, testing, and putting in order a great number of wise sayings.