Perhaps you should try some spelling variations:
"a robert b. heimann ebooks" » "a robust b. heimann ebooks", "a robert e. heimann ebooks", "a robert j. heimann ebooks", "a robert a. heimann ebooks", "a robert b. heimann ebookss", "a robert b. heimann eebooks", "a robert b. hermann ebooks", "a robert b. heinemann ebooks", "a robert b. heimann books", "a robert b. heimann ebook"
"gal robert _. heitmann book" » "goal robert _. heitmann book", "gael robert _. heitmann book", "gail robert _. heitmann book", "gal robert _. heinemann book", "gal robert _. hermann book", "gal robert _. hartmann book", "gal robert _. heitmann books", "gal robert _. heitmann ebook"

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 _. heitmann book") or ("a robert b. heimann ebooks"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("gal robert _. heitmann book") OR ("a robert b. heimann ebooks")).
• Removing quotes may allow a broader search: (( gal robert _. heitmann book ) or ( a robert b. heimann ebooks )).
• Adding a wildcard symbol may retrieve word variants: (("gal robert _. heitmann book") or ("a robert b. heimann ebooks"))*.