Perhaps you should try some spelling variations:
"a robert e. heimann book" » "a robert e. german book", "a robert _. heimann book", "a robert j. heimann book", "dr robert e. heimann book", "a robot e. heimann book"
"3 robert e. hellman book" » "3 robert e. hellman joel", "3 robert e. german book", "dr robert e. hellman book", "3 robert _. hellman book", "3 robert j. hellman 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"

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: (((("3 robert e. hellman book") or ("a robert e. heimann book"))) or ("a robust e. heilman book"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("3 robert e. hellman book") OR ("a robert e. heimann book"))) OR ("a robust e. heilman book")).
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• Adding a wildcard symbol may retrieve word variants: (((("3 robert e. hellman book") or ("a robert e. heimann book"))) or ("a robust e. heilman book"))*.