Perhaps you should try some spelling variations:
"a robert e. heilman book" » "gal robert e. heilman book", "a robert _. heilman book", "a robert j. heilman book", "a robert e. hellman book", "a robert e. heitmann book", "a robert e. heilman books", "a robert e. heilman ebook"
"a robust e. heilmann book" » "_ robust e. heilmann book", "a robust _. heilmann book", "a robust e. hellmann book", "a robust e. heitmannn book", "a robust e. heilmann books", "a robust e. heilmann ebook", "a robust e. heitmann book", "a robust e. heinemann book", "a robust e. hermann book"
"a robust e. heimann book" » "_ robust e. heimann book", "a robust _. heimann book", "a robust e. heimann books", "a robust e. heimann ebook", "a robust e. hermann book", "a robust e. heinemann book"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("a robert e. heilman book") or ((("a robust e. heilmann book") OR ("a robust e. heimann book"))))~.
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• Adding a wildcard symbol may retrieve word variants: (("a robert e. heilman book") or ((("a robust e. heilmann book") OR ("a robust e. heimann book"))))*.