What is a resume title? How should I fill it out?

Resume title helps job seekers differentiate their resumes in case they have more than one resume (maximum three are allowed) posted on Vungtaujobs.com site.
You can consider some titles like "Experienced Piping Engineer who desires to work in Engineering Field for Operator", "Experienced Contract Officer looking for opportunity in Vung Tau", etc. It would be better than you simplely typing "My Resume", "Apply for a job" etc. or anything of the sort.