Perhaps you should try some spelling variations:
"a fifty-minute series book" » "a fifty-minute bodies book", "a fifty-minute prices book", "a fifty-minute survey book", "a fifty-minute series books", "a fifty-minute services book", "a fifty-minute series block", "a fifth-minute series book"
"_ fifty-minute series book" » "_ fifty-minute bodies book", "_ fifty-minute prices book", "_ fifty-minute survey book", "_ fifty-minute series books", "_ fifty-minute services book", "_ fifty-minute series block", "_ fifth-minute series book"
"a fifty-minute period block" » "a fifty-acute period block", "a fifty-minute region block", "a fifty-minute period black", "a fifty-minute period clock", "a fifty-minute period blood", "a fifth-minute period 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: (((("a fifty-minute series book") OR ("_ fifty-minute series book"))) OR ("a fifty-minute period block")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a fifty-minute series book\") OR (\"_ fifty-minute series book\"))) or (\"a fifty-minute period block\"))".
• Removing quotes may allow a broader search: (((( a fifty-minute series book ) OR ( _ fifty-minute series book ))) or ( a fifty-minute period block )).
• Adding a wildcard symbol may retrieve word variants: (((("a fifty-minute series book") OR ("_ fifty-minute series book"))) or ("a fifty-minute period block"))*.