If it appears to the court that any of the parties entitled to notice are absent or that they cannot probably be found or be served with the notice, the court may, instead of the personal notice before mentioned or in addition thereto, order notice given to all persons interested by publishing in some newspaper the substance of the petition with the order of the court thereon assigning the time and place for a hearing or may order such other notice to be given as may, under the circumstances of the case, be considered most proper and effectual.