Perhaps you should try some spelling variations:
"a robust b. heimann book" » "a robust b. german book", "_ robust b. heimann book", "a robust a. heimann book", "a robust job. heimann book", "a robust l1. heimann book"
"a robust _. heimann book" » "a robust _. german book", "_ robust _. heimann book"
"a robert b. heilmann book" » "3 robert b. heilmann book", "dr robert b. heilmann book", "a robot b. heilmann book", "a robert _. heilmann book", "a robert e. heilmann book", "a robert j. heilmann book", "a robert b. heilemann book", "a robert b. heitmann book", "a robert b. 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 robust b. heimann book") OR ("a robust _. heimann book"))) or ("a robert b. heilmann book"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a robust b. heimann book") OR ("a robust _. heimann book"))) OR ("a robert b. heilmann book")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a robust b. heimann book\") OR (\"a robust _. heimann book\"))) or (\"a robert b. heilmann book\"))".
• Removing quotes may allow a broader search: (((( a robust b. heimann book ) OR ( a robust _. heimann book ))) or ( a robert b. heilmann book )).
• Adding a wildcard symbol may retrieve word variants: (((("a robust b. heimann book") OR ("a robust _. heimann book"))) or ("a robert b. heilmann book"))*.