The officer holding such writ shall immediately advertise and sell said real estate, lands and tenements agreeable to the provisions of this chapter, and shall readvertise and sell the same in case a prior sale has been set aside by the district court or a judge thereof. In case the real estate offered for sale shall not be sold for want of bidders, the sheriff shall, at the request of the plaintiff, readvertise and again offer said property for sale under the said writ.