Perhaps you should try some spelling variations:
della studien » delphi studien, modell studien, della studiosa
le literatura » la literatura, de literatura, e literatura
cella studie » cells studies, cells studied, cell studies
filosofia le » filosofia de, filosofia e, filosofia del

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "resta ((della studien) OR (cella studie)) _ filosofia le literatura".
• Adding a wildcard symbol may retrieve word variants: resta ((della studien) OR (cella studie)) _ filosofia le literatura*.