The sheriff under writ of execution from the court after hearing and judgment for the landlord, except as otherwise provided by law, shall make return on his execution as may be placed in his hands for collection and file the same, within 90 days after the same may have come to his hands, with the clerk of the court in which the case was heard. Upon the return of such execution such clerk shall preserve such execution in his office as is now provided as to other executions. If such return shows that a levy has been made and that property levied on remains unsold, it shall be lawful for the clerk of the court in whose office such return is filed to issue a writ of venditioni exponas thereon just as if the return were upon writ of fieri facias.