Perhaps you should try some spelling variations:
"vieweg studium; grundkurs mathematik" » "vieweg studium; vorkurs mathematik", "vieweg studium; grundkurs informatik"
"related studies; grundkurs mathematik" » "related studies; vorkurs mathematik", "related studies; grundkurs informatik"
"related species; grundkurs mathematik" » "related species; vorkurs mathematik", "related species; grundkurs informatik", "related aspects; grundkurs mathematik", "related policies; grundkurs mathematik"
"viewed studium; bruckenkurs mathematik" » "reviewed studies; bruckenkurs mathematik"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("vieweg studium; grundkurs mathematik") OR ((("viewed studium; bruckenkurs mathematik") OR ((("related studies; grundkurs mathematik") OR ("related species; grundkurs mathematik")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"vieweg studium; grundkurs mathematik\") or (((\"viewed studium; bruckenkurs mathematik\") or (((\"related studies; grundkurs mathematik\") OR (\"related species; grundkurs mathematik\"))))))".
• Removing quotes may allow a broader search: (( vieweg studium; grundkurs mathematik ) or ((( viewed studium; bruckenkurs mathematik ) or ((( related studies; grundkurs mathematik ) OR ( related species; grundkurs mathematik )))))).
• Adding a wildcard symbol may retrieve word variants: (("vieweg studium; grundkurs mathematik") or ((("viewed studium; bruckenkurs mathematik") or ((("related studies; grundkurs mathematik") OR ("related species; grundkurs mathematik"))))))*.