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

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: approches interdisciplinari e la lettre*.