I tried to register my domain with domains.live.com for email service but getting notice: This domain name can't be used because it contains a protected word or inappropriate language. Please contact support if you feel this is not the case

The domain name is vietnamvisa-onarrival.com and bestvisavietnam.com

1st i did thought that the issue come because of containing the "visa" word in the domain name. Maybe it's automatic blocked for some bad purposes of using visa card or something like that.

But the business is about visa and passport services (almost for travelling purposes), nothing's similar to visa card or any credit/debit cards informations.

Please check and help!

Thank you!