Perhaps you should try some spelling variations:
theorien linguistica » teoria linguistica, theorie linguistik, theorizing linguistic
therapie linguistik » theorie linguistik, therapie diagnostik, theatre linguistic
studium theorien » studies theories, medium theories
studie therapie » die therapie

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: (( studium theorien linguistica ) OR ( studie therapie linguistik )).
• Adding a wildcard symbol may retrieve word variants: (( studium theorien linguistica ) or ( studie therapie linguistik ))*.