Perhaps you should try some spelling variations:
de literature » de litterature, de lite'rature, de literatura
filosofia de » filosofia del
a filosofia » la filosofia, e filosofia, di filosofia
site study » sites study, sited study, state study
yeasts » yeast

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: ((yeasts OR beasts) OR feasts) ((site study) OR (situ study)) a filosofia de literature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yeasts or beasts) or feasts) ((site study) OR (situ study)) a filosofia de literature".
• Adding a wildcard symbol may retrieve word variants: ((yeasts or beasts) or feasts) ((site study) OR (situ study)) a filosofia de literature*.