'Further' in the Bible

Then I beheld all the work of God, that a man cannot find out the work that is done under the sun: because though a man labour to seek it out, yet he shall not find it; yea further; though a wise man think to know it, yet shall he not be able to find it.

For the living know that they will die, but the dead do not know anything; they have no further reward -- and even the memory of them disappears.

And further, because the preacher was wise, he still taught the people knowledge, and gave ear, and sought out -- he made right many similes.

And further, by these, my son, be admonished: of making many books there is no end; and much study is a weariness of the flesh.