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
ebooks » ebookss, eebooks
eeebooks » eeebookss, eeeebooks
heilman » heilmann, hellman, heitmann

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