Perhaps you should try some spelling variations:
hermann broch » hermann brochs
hermann book » german book, hermann lohr, hermann von
hall robert » cull robert, gal robert, thiel robert
robert e » robert _, robert j
_ robust » _ robert
robust e » robust _, robust a, robust end
ebooks » books, ebook, redbooks

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( hall robert e. ((hermann book) or (hermann broch)) ) or ( _ robust e. heitmann ebooks ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( hall robert e. ((hermann book) OR (hermann broch)) ) OR ( _ robust e. heitmann ebooks )).
• Adding a wildcard symbol may retrieve word variants: (( hall robert e. ((hermann book) or (hermann broch)) ) or ( _ robust e. heitmann ebooks ))*.