Perhaps you should try some spelling variations:
"_ fifty-minute series book" » "_ fifty-minute bodies book", "_ fifty-minute period book", "_ fifty-minute survey book", "_ fifty-minute services book", "_ fifty-minute stories book", "_ fifty-minute series back", "_ fifth-minute series book"
"_ fifty-minute series books" » "_ fifty-minute bodies books", "_ fifty-minute period books", "_ fifty-minute survey books", "_ fifty-minute series bones", "_ fifty-minute server books", "_ fifty-minute sheriffs books", "_ fifty-minute services books", "_ fifty-minute stories books", "_ fifty-minute series backs", "_ fifth-minute series books"
"_ fifty-minute series block" » "_ fifty-minute bodies block", "_ fifty-minute period block", "_ fifty-minute survey block", "_ fifty-minute stripes block", "_ fifty-minute serial block", "_ fifty-minute series back", "_ fifth-minute series block"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("_ fifty-minute series book") OR ("_ fifty-minute series books"))) OR ("_ fifty-minute series block")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"_ fifty-minute series book\") OR (\"_ fifty-minute series books\"))) or (\"_ fifty-minute series block\"))".
• Removing quotes may allow a broader search: (((( _ fifty-minute series book ) OR ( _ fifty-minute series books ))) or ( _ fifty-minute series block )).
• Adding a wildcard symbol may retrieve word variants: (((("_ fifty-minute series book") OR ("_ fifty-minute series books"))) or ("_ fifty-minute series block"))*.