Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
glass studies » loss studies, glasses studied, glass slides
di filosofia » la filosofia
e filosofia » la filosofia
text glass » text class, melt glass, jet glass

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 glass studies ((di filosofia) OR (e filosofia)) de litterature".
• Adding a wildcard symbol may retrieve word variants: text glass studies ((di filosofia) OR (e filosofia)) de litterature*.