Perhaps you should try some spelling variations:
"bibliotheca utilissima" » "bibliotheca nobilissimi", "bibliotheca classica", "bibliotheca clarissimi"
"bibliotheca rarissima" » "bibliotheca clarissimi", "bibliotheca parisiana", "bibliotheca rabinica"
"biblioteca americana" » "bibliotheca americana", "biblioteca ambrosiana", "biblia americana"

Try widening your search to All Fields.

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: (((("bibliotheca rarissima") OR ("bibliotheca utilissima"))) OR ("biblioteca americana")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"bibliotheca rarissima\") OR (\"bibliotheca utilissima\"))) or (\"biblioteca americana\"))".
• Removing quotes may allow a broader search: (((( bibliotheca rarissima ) OR ( bibliotheca utilissima ))) or ( biblioteca americana )).
• Adding a wildcard symbol may retrieve word variants: (((("bibliotheca rarissima") OR ("bibliotheca utilissima"))) or ("biblioteca americana"))*.