Perhaps you should try some spelling variations:
"vieweg studium; grundkurs mathematik" » "vieweg studium; bruckenkurs mathematik", "vieweg studium; vorkurs mathematik"
"viewed studium; grundkurs mathematik" » "viewed studium; bruckenkurs mathematik", "viewed studium; vorkurs mathematik", "reviewed studies; grundkurs mathematik"
"repeated studies; grundkurs mathematik" » "repeated studies; bruckenkurs mathematik", "repeated studies; vorkurs mathematik", "related studies; grundkurs mathematik", "repeated surveys; grundkurs mathematik"
"resolved studies; grundkurs mathematik" » "resolved studies; bruckenkurs mathematik", "resolved studies; vorkurs 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 ("vieweg studium; grundkurs informatik"))) OR ((("viewed studium; grundkurs mathematik") OR ((("repeated studies; grundkurs mathematik") OR ("resolved studies; grundkurs mathematik")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"vieweg studium; grundkurs mathematik\") OR (\"vieweg studium; grundkurs informatik\"))) or (((\"viewed studium; grundkurs mathematik\") or (((\"repeated studies; grundkurs mathematik\") or (\"resolved studies; grundkurs mathematik\"))))))".
• Removing quotes may allow a broader search: (((( vieweg studium; grundkurs mathematik ) OR ( vieweg studium; grundkurs informatik ))) or ((( viewed studium; grundkurs mathematik ) or ((( repeated studies; grundkurs mathematik ) or ( resolved studies; grundkurs mathematik )))))).
• Adding a wildcard symbol may retrieve word variants: (((("vieweg studium; grundkurs mathematik") OR ("vieweg studium; grundkurs informatik"))) or ((("viewed studium; grundkurs mathematik") or ((("repeated studies; grundkurs mathematik") or ("resolved studies; grundkurs mathematik"))))))*.