Perhaps you should try some spelling variations:
"gail robert j. heitmann book" » "gal robert j. heitmann book", "davis robert j. heitmann book", "blair robert j. heitmann book", "gail robert _. heitmann book", "gail robert e. heitmann book", "gail robert j. heimann book", "gail robert j. heinemann book", "gail robert j. hermann book", "gail robert j. heitmann books", "gail robert j. heitmann ebook"
"_ robert b. heitmann ebooks" » "_ robert _. heitmann ebooks", "_ robert e. heitmann ebooks", "_ robert a. heitmann ebooks", "_ robert b. heimann ebooks", "_ robert b. heinemann ebooks", "_ robert b. hermann ebooks", "_ robert b. heitmann ebookss", "_ robert b. heitmann eebooks", "_ robert b. heitmann books", "_ robert b. heitmann ebook"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("gail robert j. heitmann book") OR ("_ robert b. heitmann ebooks"))~.
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