Perhaps you should try some spelling variations:
daten studies » date studies, patent studies, danshen studies
data studies » dna studies, data studio, area studies
a literatura » la literatura, a literature, y literatura
filosofia a » filosofia da, filosofia la, filosofia e

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

• If you are trying to use Boolean operators, they must be ALL CAPS: text ((daten studies) OR (data studies)) la filosofia a literatura.
• Adding a wildcard symbol may retrieve word variants: text ((daten studies) or (data studies)) la filosofia a literatura*.