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 series books", "_ fifty-minute services book", "_ fifty-minute stories book", "_ fifth-minute series book"
"_ 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 block")).
• Removing quotes may allow a broader search: (( _ fifty-minute series book ) or ( _ fifty-minute series block )).
• Adding a wildcard symbol may retrieve word variants: (("_ fifty-minute series book") or ("_ fifty-minute series block"))*.