Perhaps you should try some spelling variations:
theorie linguistica » teoria linguistica, theorie linguistik, theory linguistics
theatre linguistic » theory linguistic, theory linguistics, other linguistic
studie theorie » studies theories, studium theorien, studie therapie
studie theatre » studies theatre, studio theatre, study theatre

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: (( studie theorie linguistica ) OR ( studie theatre linguistic )).
• Adding a wildcard symbol may retrieve word variants: (( studie theorie linguistica ) or ( studie theatre linguistic ))*.