Amal to find a lost item, person or child

The following is an Amal to find a lost item, person or child:

After any Salaah recite 500 times “لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ الْعَلِيِّ الْعَظِيمِ” preceeded and followed by Durood shareef thrice. Thereafter make Dua to Allah.