Perhaps you should try some spelling variations:
polite literature » prose literature
life literature » prose literature
tests safety » test safety, guests safety, stents safety
e filosofia » la filosofia

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 safety studies e filosofia ((life literature) OR (polite literature))".
• Adding a wildcard symbol may retrieve word variants: tests safety studies e filosofia ((life literature) OR (polite literature))*.