Perhaps you should try some spelling variations:
strumenti per » strumento per
la didactics » a didactics, _ didactics, la didattica
la didactica » la didattica, a didactical, alla didattica
una ricerca » la ricerca, alla ricerca
a didactic » _ didactics
e una » e und, _ una, a una

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