The requested vessel with name HOANG SA and MMSI:574999503 and IMO:0 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
HOANG SA 02 N/A 574110007 Dec 07, 2017 01:23 UTC

Also, you may try to find the vessel in our comprehensive Vessels Database or track this ship on the map.