Yes. Currently, HostingViet has a policy to try out cheap VPS (see instructions here).
HostingViet is committed to VPS quality, the parameters are exactly as announced. HostingViet can commit in writing if requested.
In addition, you can request a Refund within the first 30 days without conditions. This is to ensure service quality as committed. Please feel secure using Cloud VPS SSD service at HostingViet.