Perhaps you should try some spelling variations:
"sema der springer series" » "sema _ springer series", "sema der finger series", "sema 1st springer series", "sdiema der springer series", "thema der springer series"
"schema der springer series" » "schema _ springer series", "schema der finger series", "schema 1st springer series", "thema der springer series"

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: "((\"sema der springer series\") OR (\"schema der springer series\"))".
• Removing quotes may allow a broader search: (( sema der springer series ) OR ( schema der springer series )).
• Adding a wildcard symbol may retrieve word variants: (("sema der springer series") OR ("schema der springer series"))*.