Perhaps you should try some spelling variations:
"a robert b. heimann book" » "a robert b. german book", "3 robert b. heimann book", "dr robert b. heimann book", "a robust b. heimann book", "a robert _. heimann book", "a robert j. heimann book", "a robert a. heimann book"
"a robert e. hermann book" » "a robert e. german book", "a robert e. hermann broch", "a robert e. hermann lohr", "3 robert e. hermann book", "dr robert e. hermann book", "a robust e. hermann book", "a robert _. hermann book", "a robert j. hermann book"
"a robert b. heimann ebook" » "3 robert b. heimann ebook", "dr robert b. heimann ebook", "a robust b. heimann ebook", "a robert _. heimann ebook", "a robert j. heimann ebook", "a robert a. heimann ebook"

Try widening your search to All Fields.

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 b. heimann ebook"))))~.
• 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 b. heimann ebook")))).
• 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 b. heimann ebook\"))))".
• Removing quotes may allow a broader search: (( a robert e. hermann book ) or ((( a robert b. heimann book ) OR ( a robert b. heimann ebook )))).
• Adding a wildcard symbol may retrieve word variants: (("a robert e. hermann book") or ((("a robert b. heimann book") OR ("a robert b. heimann ebook"))))*.