Perhaps you should try some spelling variations:
"a robert _. heilmann book" » "gal robert _. heilmann book", "a robert _. heitmann book", "a robert _. heinemann book", "a robert _. hellman book", "a robert _. heilmann books", "a robert _. heilmann ebook"
"a robust e. heimann book" » "_ robust e. heimann book", "a robust _. heimann book", "a robert e. heimann book", "a robust e. heimann books", "a robust e. heimann ebook", "a robust e. heinemann book"
"a robust e. hermann book" » "_ robust e. hermann book", "a robust _. hermann book", "a robert e. hermann book", "a robust e. hermann books", "a robust e. hermann ebook"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("a robert _. heilmann book") or ((("a robust e. heimann book") or ("a robust e. hermann book"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("a robert _. heilmann book") OR ((("a robust e. heimann book") OR ("a robust e. hermann book")))).
• Removing quotes may allow a broader search: (( a robert _. heilmann book ) or ((( a robust e. heimann book ) or ( a robust e. hermann book )))).
• Adding a wildcard symbol may retrieve word variants: (("a robert _. heilmann book") or ((("a robust e. heimann book") or ("a robust e. hermann book"))))*.