Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
da literatura » a literatura, de literatura, na literatura
di filosofia » la filosofia, e filosofia
safe studie » safe studio, life studie, case studie
tests safe » tests safety, tests scale, tests space
studie di » studie die, studie d, studie de

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 safe studie di filosofia ((da literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: tests safe studie di filosofia ((da literatura) OR (la literatura))*.