Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
de filosofia » e filosofia, di filosofia, la filosofia
filosofia la » filosofia da, filosofia le, filosofica da
tests duale » tests due, tests damage
tests scale » tests stable, sets scale, tests safe
studien de » studien der, studien die, studien 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 duale) OR (tests scale)) studien de filosofia la literatura".
• Adding a wildcard symbol may retrieve word variants: ((tests duale) OR (tests scale)) studien de filosofia la literatura*.