Perhaps you should try some spelling variations:
working studies » docking studies, forming studies, morning studies
costs working » cost working, posts working, lists working
di literatura » de literatura, ii literatura, di letteratura
da literatura » la literatura, a literatura, de literatura
a filosofia » la filosofia, e filosofia, di 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: "costs working studies a filosofia ((di literatura) OR (da literatura))".
• Adding a wildcard symbol may retrieve word variants: costs working studies a filosofia ((di literatura) OR (da literatura))*.