Perhaps you should try some spelling variations:
hermann book » german book, hermann broch, hermann lohr
gal robert » hall robert
robert j » robert _, robert e
a robust » _ robust
robust e » robust _, robust a, robust end
heilmann » heilemann, heimann, heitmann
ebookss » ebooks
eebookss » eebooks, ebooks

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

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