Perhaps you should try some spelling variations:
janett robert » barnett robert, marett robert, arnott robert
robert j » robert _, robert e
a robert » 3 robert, dr robert, a robust
robert b » robert _, robert e, robert a
ebookss » ebooksss, eebookss
ebooks » ebookss, eebooks
book » books, ebook

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( janett robert j. heinemann (ebookss OR ebooks) ) OR ( a robert b. heitmann book ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( janett robert j. heinemann (ebookss OR ebooks) ) or ( a robert b. heitmann book ))~".
• Adding a wildcard symbol may retrieve word variants: (( janett robert j. heinemann (ebookss OR ebooks) ) or ( a robert b. heitmann book ))*.