Perhaps you should try some spelling variations:
studio de » estudio de, studio del, studio dei
studie de » studie der, studie die, studie des
studi de » estudi de, studi del, studi di
"studi e saggi" » "studi _ saggi", "studi di saggi", "studi de saggi"

Try widening your search to All Fields.

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: (("studi e saggi") OR ("((((studi de) OR (studio de))) or (studie de)) saggi")).
• Removing quotes may allow a broader search: (( studi e saggi ) or ( ((((studi de) OR (studio de))) or (studie de)) saggi )).
• Adding a wildcard symbol may retrieve word variants: (("studi e saggi") or ("((((studi de) OR (studio de))) or (studie de)) saggi"))*.