Perhaps you should try some spelling variations:
"lecture notes of the funcoes matematici della" » "lecture notes of the funcoes matematica della", "lecture notes of the functions mathematics della", "lecture notes of the functions mathematica della", "lecture notes of the funcoes matematici per"
"lecture notes of the la matematica della" » "lecture notes of the la matematica nella", "lecture notes of the la matematiche dalla", "lecture notes of the la matematica nel", "lecture notes of the a mathematica della", "lecture notes of the e matematica della", "lecture notes of the della matematica della"
"lecture notes of the la matematica da" » "lecture notes of the a mathematica da", "lecture notes of the e matematica da", "lecture notes of the della matematica da", "lecture notes of the la matematica e", "lecture notes of the la matematica _", "lecture notes of the la matematica i"

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 matematici della") OR ((("lecture notes of the la matematica della") OR ("lecture notes of the la matematica da")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"lecture notes of the funcoes matematici della\") or (((\"lecture notes of the la matematica della\") OR (\"lecture notes of the la matematica da\"))))".
• Removing quotes may allow a broader search: (( lecture notes of the funcoes matematici della ) or ((( lecture notes of the la matematica della ) OR ( lecture notes of the la matematica da )))).
• Adding a wildcard symbol may retrieve word variants: (("lecture notes of the funcoes matematici della") or ((("lecture notes of the la matematica della") OR ("lecture notes of the la matematica da"))))*.