Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
da litterature » la litterature, a litterature, a literature
devo studies » vivo studies, device studies, video studies
ego studies » mgo studies, echo studies, iglo studies
divo studie » vivo studie, vivo studies, dsgvo studie
e filosofia » la filosofia

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: test ((((devo studies) OR (ego studies))) OR (divo studie)) e filosofia ((da litterature) OR (de litterature)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "test ((((devo studies) or (ego studies))) or (divo studie)) e filosofia ((da litterature) OR (de litterature))".
• Adding a wildcard symbol may retrieve word variants: test ((((devo studies) or (ego studies))) or (divo studie)) e filosofia ((da litterature) OR (de litterature))*.