Perhaps you should try some spelling variations:
"a fifty-minute series book" » "a fifty-minute bodies book", "a fifty-minute survey book", "a fifty-minute series books", "a fifty-minute services book", "a fifty-minute series block", "_ fifty-minute series book", "a 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 blood", "A Fifty-minute period book"
"A Fifty-minute period clock" » "A Fifty-acute period clock", "A Fifty-minute region clock", "A Fifty-minute periodic clock", "A Fifty-minute period choice", "A Fifty-minute period cross"

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 ((("A Fifty-minute period block") OR ("A Fifty-minute period clock")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"a fifty-minute series book\") or (((\"A Fifty-minute period block\") OR (\"A Fifty-minute period clock\"))))".
• Removing quotes may allow a broader search: (( a fifty-minute series book ) or ((( A Fifty-minute period block ) OR ( A Fifty-minute period clock )))).
• Adding a wildcard symbol may retrieve word variants: (("a fifty-minute series book") or ((("A Fifty-minute period block") OR ("A Fifty-minute period clock"))))*.