Perhaps you should try some spelling variations:
gail robert » gal robert, davis robert, blair robert
robert j » robert _
a robert » gal robert, a robust
robert e » robert _
book » books, ebook
ebooksss » ebookssss, eebooksss, ebooks
eebookss » eebooksss, eeebookss, ebooks
heitmann » heimann, heinemann, hartmann

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 book ) or ( a robert e. heitmann (ebooksss or eebookss) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( gail robert j. hermann book ) OR ( a robert e. heitmann (ebooksss OR eebookss) )).
• Adding a wildcard symbol may retrieve word variants: (( gail robert j. hermann book ) or ( a robert e. heitmann (ebooksss or eebookss) ))*.