Perhaps you should try some spelling variations:
schrifttum uber » schrifttums der (Expand Search)
uber deutschen » der deutschen (Expand Search), uber deutschland (Expand Search), unsere deutschen (Expand Search)
im schrifttum » das schrifttum (Expand Search)
forderung im » forderung des (Expand Search), forderung der (Expand Search)
band 11 » band 1 (Expand Search)
band 12 » band 2 (Expand Search), band 1 (Expand Search)

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: "forderung im schrifttum uber deutschen aus bessarabien : ((band 11) OR (band 12))~".
• Adding a wildcard symbol may retrieve word variants: forderung im schrifttum uber deutschen aus bessarabien : ((band 11) OR (band 12))*.