Perhaps you should try some spelling variations:
"a robert j. heilman book" » "gal robert j. heilman book", "a robert _. heilman book", "a robert j. heilmann book", "a robert j. hellman book", "a robert j. heitmann book", "a robert j. heilman books", "a robert j. heilman ebook"
"a robert e. heimann book" » "gal robert e. heimann book", "a robert _. heimann book", "a robert e. heimann books", "a robert e. heimann ebook", "a robert e. heinemann book"
"a robust e. hermann book" » "_ robust e. hermann book", "a robust _. hermann book", "a robust e. hermann books", "a robust e. hermann 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 j. heilman book") or ((("a robert e. heimann book") or ("a robust e. hermann book"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("a robert j. heilman book") OR ((("a robert e. heimann book") OR ("a robust e. hermann book")))).
• Removing quotes may allow a broader search: (( a robert j. heilman book ) or ((( a robert e. heimann book ) or ( a robust e. hermann book )))).
• Adding a wildcard symbol may retrieve word variants: (("a robert j. heilman book") or ((("a robert e. heimann book") or ("a robust e. hermann book"))))*.