Perhaps you should try some spelling variations:
altdeutsches schrifttum » deutsches schrifttum (Expand Search)
fur altdeutsches » fur ostdeutsches (Expand Search), fur ostdeutsche (Expand Search), fur deutsche (Expand Search)
schrifttum russ » schrifttum und (Expand Search)
russ sprache » und sprache (Expand Search)
buch fur » auch fur (Expand Search), buch nr (Expand Search), buch der (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: buch fur altdeutsches schrifttum russ sprache e.v.~.
• Adding a wildcard symbol may retrieve word variants: buch fur altdeutsches schrifttum russ sprache e.v.*.