Perhaps you should try some spelling variations:
"nmr basic principles and progress / nmr grundlagen und fortschritt" » "nmr basic principles and progress / nmr grundlagen der fortschritt", "nmr basic principles and progress / nmr grundlagen und fortgeschrittene", "nmr basic principles and progress / eur grundlagen und fortschritt", "nmr basic principles and progress / der grundlagen und fortschritt", "nmr basic principles and progress / pr grundlagen und fortschritt", "nmr based principles and progress / nmr grundlagen und fortschritt", "fur basic principles and progress / nmr grundlagen und fortschritt", "r basic principles and progress / nmr grundlagen und fortschritt"
"our basic principles and progress / nmr grundlagen und fortschritt" » "our basic principles and progress / nmr grundlagen der fortschritt", "our basic principles and progress / nmr grundlagen und fortgeschrittene", "our basic principles and progress / eur grundlagen und fortschritt", "our basic principles and progress / der grundlagen und fortschritt", "our basic principles and progress / pr grundlagen und fortschritt", "four basic principles and progress / nmr grundlagen und fortschritt", "your basic principles and progress / nmr grundlagen und fortschritt"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nmr basic principles and progress / nmr grundlagen und fortschritt\") OR (\"our basic principles and progress / nmr grundlagen und fortschritt\"))".
• Removing quotes may allow a broader search: (( nmr basic principles and progress / nmr grundlagen und fortschritt ) OR ( our basic principles and progress / nmr grundlagen und fortschritt )).
• Adding a wildcard symbol may retrieve word variants: (("nmr basic principles and progress / nmr grundlagen und fortschritt") OR ("our basic principles and progress / nmr grundlagen und fortschritt"))*.