Perhaps you should try some spelling variations:
litterature sarda » letteratura sarda, litterature par, litterature serbe
letteratura arte » letteratura arti, letteratura sarda, letteratura e
de litterature » la litterature, et litterature
amandi libri » magni libri
i amandi » _ mandi, 1 amanda, 2 amanda
libri de » libro de, libre de, libri duo
ii x » ii a, ii 1, ii 2

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: (( _ amanda ((ii x) OR (ii _)) letteratura arte ) OR ( i amandi libri de litterature sarda ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( _ amanda ((ii x) OR (ii _)) letteratura arte ) or ( i amandi libri de litterature sarda ))*".