The obvious methods are air freight or courier (DHL) or post office. The first two are quick and reliable but expensive. The third is economical but not always reliable. You could also contact a shipping / freight forwarding company in Hanoi to explore options by sea/land.
With air freight or courier, you need to consider the "storage" time, as the bags would travel much quicker than you. You would need to arrange for the bags to be held until you arrive (not sure how long an airline or courier service would hold your shipment) or have a friend ship the bags closer to your arrival date in Borneo.
You also have customs to consider. With air freight or sea/land you may need to have a custom broker to deal with customs. With courier service, they provide customs service as part of the shipping fee. The Post Office usually also provides custom service.