Perhaps you should try some spelling variations:
"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 robot e. hermann book", "a robert _. hermann book"
"a robust e. heimann book" » "a robust e. german book", "_ robust e. heimann book", "a robust _. heimann book", "a robust a. heimann book", "a robust end. heimann book"
"a robert j. heilmann book" » "3 robert j. heilmann book", "dr robert j. heilmann book", "a robot j. heilmann book", "a robert _. heilmann book", "a robert j. heilemann book", "a robert j. heitmann book", "a robert j. heilman book"

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