Perhaps you should try some spelling variations:
litterature del » litterature de, litterature des, litterature et
di letteratura » e letteratura, de literatura, della letteratura
letteratura di » letteratura e, literatura de
de litterature » la litterature, et litterature
grunde bei » grunde der, grunde des
bei di » bei dir, bei dia, bei dic
i gran » i grand, i grain, i grani

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: (( i grunde bei di letteratura di ) OR ( i gran libro de litterature del )).
• Adding a wildcard symbol may retrieve word variants: (( i grunde bei di letteratura di ) or ( i gran libro de litterature del ))*.