Perhaps you should try some spelling variations:
"a robust b. hermann book" » "a robust b. german book", "a robust b. hermann broch", "a robust b. hermann lohr", "_ robust b. hermann book", "a robust _. hermann book", "a robust a. hermann book", "a robust job. hermann book"
"a robert j. heimann book" » "a robert j. german book", "3 robert j. heimann book", "dr robert j. heimann book", "a robot j. heimann book", "a robert _. heimann book"
"a robert e. heimann book" » "a robert e. german book", "3 robert e. heimann book", "dr robert e. heimann book", "a robot e. heimann book", "a robert _. heimann 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 robust b. hermann book") or ((("a robert j. heimann book") OR ("a robert e. heimann book"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("a robust b. hermann book") OR ((("a robert j. heimann book") OR ("a robert e. heimann book")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"a robust b. hermann book\") or (((\"a robert j. heimann book\") OR (\"a robert e. heimann book\"))))".
• Removing quotes may allow a broader search: (( a robust b. hermann book ) or ((( a robert j. heimann book ) OR ( a robert e. heimann book )))).
• Adding a wildcard symbol may retrieve word variants: (("a robust b. hermann book") or ((("a robert j. heimann book") OR ("a robert e. heimann book"))))*.