whois xetaimydinh.edu.vn)[Xe

Domain:
Turn off cache
Try for webbased whois (don't expect it to work yet)

xetaimydinh.edu.vn)[Xe

checking....xetaimydinh.edu.vn)[Xe
$ whois xetaimydinh.edu.vn)[Xe
No whois server is known for this kind of object.