Perhaps you should try some spelling variations:
"a robert j. heimann books" » "a robert j. demand books", "a robert j. german books", "3 robert j. heimann books", "dr robert j. heimann books", "a robot j. heimann books", "a robert e. heimann books"
"a robert _. hermann book" » "a robert _. german book", "a robert _. hermann broch", "a robert _. hermann lohr", "3 robert _. hermann book", "dr robert _. hermann book", "a robot _. hermann 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"

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 j. heimann books") OR ("a robert _. hermann book"))) OR ("a robust e. heilman book"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a robert j. heimann books\") OR (\"a robert _. hermann book\"))) OR (\"a robust e. heilman book\"))".
• Removing quotes may allow a broader search: (((( a robert j. heimann books ) OR ( a robert _. hermann book ))) OR ( a robust e. heilman book )).
• Adding a wildcard symbol may retrieve word variants: (((("a robert j. heimann books") OR ("a robert _. hermann book"))) OR ("a robust e. heilman book"))*.