Perhaps you should try some spelling variations:
hermann ebooks » german books
hermann books » german books, hermann brochs, hermann broch
gail robert » gal robert, hall robert, ball robert
robust end » robust read, robust bound
robert e » robert _, robert j
robust e » robust _, robust a, robust l1

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: (( gail robert e. hermann books ) OR ( a ((robust e) OR (robust end)). hermann ebooks ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( gail robert e. hermann books ) or ( a ((robust e) OR (robust end)). hermann ebooks ))~".
• Adding a wildcard symbol may retrieve word variants: (( gail robert e. hermann books ) or ( a ((robust e) OR (robust end)). hermann ebooks ))*.