Perhaps you should try some spelling variations:
hermann books » german books, hermann brochs, hermann broch
gail robert » gal robert, hall robert, ball robert
robert j » robert _
a robert » 3 robert, dr robert, a robust
robert e » robert _
ebooksss » ebooks
eebookss » ebooks

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

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