Perhaps you should try some spelling variations:
"lecture notes of the funcoes matematica della" » "lecture notes of the functions mathematical della", "lecture notes of the functions mathematics della", "lecture notes of the funcoes matematici della", "lecture notes of the funcoes matematica nella", "lecture notes of the funcoes matematiche dalla"
"lecture notes of the una matematica della" » "lecture notes of the una matematici della", "lecture notes of the una matematica nella", "lecture notes of the una matematiche dalla", "lecture notes of the la matematica della", "lecture notes of the a matematica della", "lecture notes of the munari matematica della"
"lecture notes of the tra matematica della" » "lecture notes of the tra matematici della", "lecture notes of the tra matematica nella", "lecture notes of the tra matematiche dalla", "lecture notes of the la matematica della", "lecture notes of the a mathematica della", "lecture notes of the e matematica della"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("lecture notes of the funcoes matematica della") OR ((("lecture notes of the una matematica della") OR ("lecture notes of the tra matematica della")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"lecture notes of the funcoes matematica della\") or (((\"lecture notes of the una matematica della\") OR (\"lecture notes of the tra matematica della\"))))".
• Removing quotes may allow a broader search: (( lecture notes of the funcoes matematica della ) or ((( lecture notes of the una matematica della ) OR ( lecture notes of the tra matematica della )))).
• Adding a wildcard symbol may retrieve word variants: (("lecture notes of the funcoes matematica della") or ((("lecture notes of the una matematica della") OR ("lecture notes of the tra matematica della"))))*.