SQL Server Full Text Search uses language specific Word Breakers.
For the German language this is used to break/split words including compound words. However, it appears not all known compound words are included in the Word Breaker. I would like to know if a list is available of the words the Word Breaker does know about.
The answer is there is no answer. According to Microsoft , the words are not stored - they use a formula to "break" them. This will never be 100% accurate so i will just have to live with this fact.