Perhaps you should try some spelling variations:
la didactics » la didactica, a didactics, _ didactics
didactics e » didactics _, didactics 2, didactics 3
una ricerca » la ricerca, alla ricerca
a ricerca » la ricerca, e ricerca, tra ricerca
strumento » strumenti

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: strumento per la didactics e ((a ricerca) OR (una ricerca)).
• Adding a wildcard symbol may retrieve word variants: strumento per la didactics e ((a ricerca) or (una ricerca))*.