Perhaps you should try some spelling variations:
filosofica la » filosofica da, filosofia la, filosofia da
la literatura » la litterature, a literature
tests scale » tests stable, sets scale, tests safe
studies die » studies does, studies dose, studies ds
studie die » studie der

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 ((studies die) OR (studie die)) filosofica la literatura".
• Adding a wildcard symbol may retrieve word variants: tests scale ((studies die) OR (studie die)) filosofica la literatura*.