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

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 e. hermann book") or ((("a robert b. heimann book") OR ("a robert _. heimann book"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("a robert e. hermann book") OR ((("a robert b. heimann book") OR ("a robert _. heimann book"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"a robert e. hermann book\") or (((\"a robert b. heimann book\") OR (\"a robert _. heimann book\"))))*".
• Removing quotes may allow a broader search: (( a robert e. hermann book ) or ((( a robert b. heimann book ) OR ( a robert _. heimann book ))))*.