Perhaps you should try some spelling variations:
hermann book » german book, hermann broch, hermann von
hermann lohr » hermann der, hermann von
gal robert » hall robert
3 robert » dr robert
robert j » robert _
robert e » robert _
ebooks » books, ebook, redbooks

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: (( 3 robert j. ((hermann book) OR (hermann lohr)) ) OR ( gal robert e. heinemann ebooks ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( 3 robert j. ((hermann book) OR (hermann lohr)) ) or ( gal robert e. heinemann ebooks ))~".
• Adding a wildcard symbol may retrieve word variants: (( 3 robert j. ((hermann book) OR (hermann lohr)) ) or ( gal robert e. heinemann ebooks ))*.