Perhaps you should try some spelling variations:
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"a robust _. heilman book" » "a robust _. german book", "_ robust _. heilman book"
"a robust b. heilmann book" » "_ robust b. heilmann book", "a robust a. heilmann book", "a robust job. heilmann book", "a robust l1. heilmann book", "a robust b. heilemann book", "a robust b. heimann book", "a robust b. heitmann book"

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