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