Perhaps you should try some spelling variations:
"a robert j. heilman book" » "a robert j. german book", "3 robert j. heilman book", "dr robert j. heilman book", "a robot j. heilman book", "a robert _. heilman book"
"a robust e. heilman book" » "a robust e. german book", "_ robust e. heilman book", "a robust _. heilman book", "a robust a. heilman book", "a robust end. heilman book"
"a robert e. heilmann book" » "3 robert e. heilmann book", "dr robert e. heilmann book", "a robot e. heilmann book", "a robert _. heilmann book", "a robert e. heilemann book", "a robert e. heimann book", "a robert e. heitmann 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. heilman book") or ("a robert e. heilmann book"))) or ("a robust e. heilman book"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a robert j. heilman book") OR ("a robert e. heilmann book"))) OR ("a robust e. heilman book")).
• Removing quotes may allow a broader search: (((( a robert j. heilman book ) or ( a robert e. heilmann book ))) or ( a robust e. heilman book )).
• Adding a wildcard symbol may retrieve word variants: (((("a robert j. heilman book") or ("a robert e. heilmann book"))) or ("a robust e. heilman book"))*.