Perhaps you should try some spelling variations:
del litterature » de litterature, des litteratures, et litterature
scale studies » case studies, scale study
di filosofia » la filosofia, e filosofia
tests scale » tests stable, sets scale, tests safe
studies di » studies die, studies div, studies ds

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: tests scale studies di filosofia del litterature*.