Perhaps you should try some spelling variations:
approches interdisciplinari » approaches interdisciplinary, approches interdisciplinaires, approcci interdisciplinari
interdisciplinari e » interdisciplinario de, interdisciplinaria de, interdisciplinarita e
la lecture » a lecture, a lecturer, m.a lecturer
lettre » lettres

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: approches interdisciplinari e ((la lecture) OR (la lettre)).
• Adding a wildcard symbol may retrieve word variants: approches interdisciplinari e ((la lecture) or (la lettre))*.