It seems that I need to post my problem here to get help.

I cannt add the domain gamebank.vn because of the error "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.".

This domain is for a trading business, in which we help users sell and buy virtual items of online games, also we sell cards for play online games and for recharging mobile phone services.

Plz let me know if you need more information.

Regards