Perhaps you should try some spelling variations:
"a robert _. hermann book" » "gal robert _. hermann book", "a robert _. hermann books", "a robert _. hermann ebook"
"a robert j. heimann book" » "gal robert j. heimann book", "a robert e. heimann book", "a robert j. heimann books", "a robert j. heimann ebook", "a robert j. heinemann book"
"a robust j. heimann book" » "_ robust j. heimann book", "a robust _. heimann book", "a robust j. heimann books", "a robust j. heimann ebook", "a robust j. 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 _. hermann book") or ((("a robert j. heimann book") OR ("a robust j. heimann book"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("a robert _. hermann book") OR ((("a robert j. heimann book") OR ("a robust j. heimann book"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"a robert _. hermann book\") or (((\"a robert j. heimann book\") OR (\"a robust j. heimann book\"))))*".
• Removing quotes may allow a broader search: (( a robert _. hermann book ) or ((( a robert j. heimann book ) OR ( a robust j. heimann book ))))*.