Perhaps you should try some spelling variations:
la literature » la litterature, a literature, la literatura
filosofia la » filosofia da, filosofia le, filosofica da
tests scale » tests stable, sets scale, tests shall
e filosofia » la filosofia
tests safe » tests safety, tests space, tests tafel

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 scale) OR (tests safe)) study e filosofia la literature".
• Adding a wildcard symbol may retrieve word variants: ((tests scale) OR (tests safe)) study e filosofia la literature*.