Perhaps you should try some spelling variations:
"viewed studium; grundkurs mathematik" » "viewed studium; bruckenkurs mathematik", "viewed studium; grundkurs informatik", "reviewed studies; grundkurs mathematik"
"resolved studies; grundkurs mathematik" » "resolved studies; bruckenkurs mathematik", "resolved studies; grundkurs informatik"

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; vorkurs mathematik") OR ((("viewed studium; grundkurs mathematik") OR ("resolved studies; grundkurs mathematik")))).
• Removing quotes may allow a broader search: (( vieweg studium; vorkurs mathematik ) or ((( viewed studium; grundkurs mathematik ) or ( resolved studies; grundkurs mathematik )))).
• Adding a wildcard symbol may retrieve word variants: (("vieweg studium; vorkurs mathematik") or ((("viewed studium; grundkurs mathematik") or ("resolved studies; grundkurs mathematik"))))*.