Changing My Main Domain

[baongoc159]

Hi Team,

hosting account username:  baongoc159

main domain:batdongsanthongminh.id.vn

I'm totally new to web development. Please help and give me detail or document how to setup after.
I did follow my domain seller and fill in like this:

[KazVee]

Hello and welcome! To use that domain with us, first you'd need to request that we change the domain on your account, since that's not something users can do themselves yet. I've changed the domain for you now, so that part is done. 🙂

Next, to host your site with us, you can either create an A record and point it to us, or you can use our nameservers. Since your screenshot shows nameservers (NS), that's probably most straightforward to do.

I've never used Tenten before but I googled to find a help page that should show you how to enter in the details: https://help.tenten.vn/huong-dan-cau-hinh-nameserver-o-tenten/ 
Their guidance says to enter the web address of your site in the `Name` field. Then, create NS records, NS1 will be `ns1.heliohost.org` and NS2 will be `ns2.heliohost.org`. Give that a try and let us know if you have any trouble. 

The other way to do it would be to create an A record and point it to the IP address for the Johnny server. You can see the IP address to use inside Plesk > Websites & Domains > [domain name] > and check at the bottom of the page.