Perhaps you should try some spelling variations:
easier studies » eastern studies, earlier studies, laser studies
de filosofica » de filosofia, e filosofia, di filosofia
tests easier » gets easier, tasks easier, tests basieren
e filosofica » e filosofia, e filosofiche, a 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 easier studies ((de filosofica) OR (e filosofica)) _ literatura".
• Adding a wildcard symbol may retrieve word variants: tests easier studies ((de filosofica) OR (e filosofica)) _ literatura*.