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