1) You can USE a .de, but VodaHost cannot register them. You will have to go through a German company to register it and then just point the name servers to vodahost.

2) To be perfectly honest, I would fine a different name. The point of a domain name is to have something easier to remember then an ip address. Marketing wise you want the domain to be something you can just say the domain name and people will know. If people have to stop and write it down or need you to spell it out then its not doing its job.

Having multiple hyphens is going to complicate it, and having "dr.ckv-psychotherapie.de" would mean registering "ckv-psychotherapie.de" and making a subdomain called "dr". Having "dr.ckv.psychotherapie" would mean registering "psychotherapie" creating a subdomain called "ckv", and then making a subdomain on the subdomain called "dr". (Note subdomains are created on your hosting account, it doesn't have to do with registering the actual domain).

The only characters you can have in a domain name are:

a-z
0-9
-

Hope that helps

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