Perhaps you should try some spelling variations:
filosofia life » filosofia de, filosofia e, filosofia di
delle studien » duale studien, delphi studien, modell studien
filosofia le » filosofia de, filosofia e, filosofia del
test delle » testi delle, tesi delle, test della
studien de » studien der, studien die, studien des

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: "test delle studien de ((filosofia life) OR (filosofia le)) literature*".