Perhaps you should try some spelling variations:
mathematical geosciences » mathematical sciences, mathematical science, mathematics science
appendix mathematische » appendix mathmatical, anwendung mathematische, appendix b:mathematical
appendix mathematics » appendices mathematics, appendix mathmatical, appendix b:mathematical

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: (( appendix mathematical geosciences ) OR ( ((appendix mathematische) OR (appendix mathematics)) science )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( appendix mathematical geosciences ) or ( ((appendix mathematische) OR (appendix mathematics)) science ))".
• Adding a wildcard symbol may retrieve word variants: (( appendix mathematical geosciences ) or ( ((appendix mathematische) OR (appendix mathematics)) science ))*.