Perhaps you should try some spelling variations:
patent studies » patient studies, patients studies, platelet studies
latest studies » platelet studies, harvest studies, east studies
del literatura » de literatura, pela literatura, da literatura
e filosofia » la 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: "text ((patent studies) OR (latest studies)) e filosofia del literatura*".