Perhaps you should try some spelling variations:
dose filosofia » de filosofia, masse filosofia, sobre filosofia
la literatura » la litterature, a literature
case studies » case study
studies dose » studies ds, studies do, studies does
basin » basic, basis

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: basin case studies dose filosofia ((y literatura) OR (la literatura))*.