Perhaps you should try some spelling variations:
de literatura » de litterature, la literatura, y literatura
tests during » costs during, protests during, testing during
filosofia de » filosofia del
studie di » studie die, studie d, studie der
studie de » studie der, studie die, studie 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: "tests during ((studie di) OR (studie de)) filosofia de literatura".
• Adding a wildcard symbol may retrieve word variants: tests during ((studie di) OR (studie de)) filosofia de literatura*.