Perhaps you should try some spelling variations:
hermann book » german book, hermann broch, hermann lohr
goal robert » gal robert, deal robert, fogel robert
robert j » robert _
robust e » robust _, robust a, robust end
robert e » robert _
heilman » heilmann, hellman, helman
eebooks » redbooks, texbooks

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( goal robert j. hermann book ) or ( a ((robust e) OR (robert e)). heilman (ebooks or eebooks) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( goal robert j. hermann book ) OR ( a ((robust e) OR (robert e)). heilman (ebooks OR eebooks) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( goal robert j. hermann book ) or ( a ((robust e) OR (robert e)). heilman (ebooks or eebooks) ))".
• Adding a wildcard symbol may retrieve word variants: (( goal robert j. hermann book ) or ( a ((robust e) OR (robert e)). heilman (ebooks or eebooks) ))*.