to go to great lengths; to try everything or search everywhere. This idiom literally means to go up to heaven and down into the earth.

To search everywhere or use every possible means to achieve a goal; to move heaven and earth to find a solution or a way out of a problem.

Literally "no road to heaven, no door into the earth"; to be at the end of one's rope with no way out of a desperate situation.

to go underground; to turn to secret or illegal activities