Perhaps you should try some spelling variations:
"3 robert b. german book" » "3 robert b. german books", "3 robert b. german food", "dr robert b. german book", "3 robert e. german book", "3 robert a. german book"
"3 robert j. german book" » "3 robert j. german books", "3 robert j. german food", "dr robert j. german book", "3 robert e. german book"
"gal robert _. heimann ebook" » "hall robert _. heimann ebook"

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: (((("3 robert b. german book") OR ("3 robert j. german book"))) or ("gal robert _. heimann ebook"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("3 robert b. german book") OR ("3 robert j. german book"))) OR ("gal robert _. heimann ebook")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"3 robert b. german book\") OR (\"3 robert j. german book\"))) or (\"gal robert _. heimann ebook\"))".
• Removing quotes may allow a broader search: (((( 3 robert b. german book ) OR ( 3 robert j. german book ))) or ( gal robert _. heimann ebook )).
• Adding a wildcard symbol may retrieve word variants: (((("3 robert b. german book") OR ("3 robert j. german book"))) or ("gal robert _. heimann ebook"))*.