Perhaps you should try some spelling variations:
filologia et » filologia e, filologica e, fisiologia e
acase study » case study
filosofia e » filosofia de, filosofia del
oral acase » oral case, oral care, oral phase
study die » study deep, study d, study direct

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: "oral acase study die ((filologia et) OR (filosofia e)) litterature".
• Adding a wildcard symbol may retrieve word variants: oral acase study die ((filologia et) OR (filosofia e)) litterature*.