Perhaps you should try some spelling variations:
"a fifty-minute sheriffs books" » "a fifty-minute sheriffs commons", "_ fifty-minute sheriffs books", "a fifth-minute sheriffs books"
"a fifty-minute survey books" » "a fifty-site survey books", "a fifty-minute surveys books", "a fifty-minute survey book", "a fifty-minute surveys book", "_ fifty-minute survey books", "a fifth-minute survey books"
"a fifty-minute serial block" » "a fifty-minute social block", "a fifty-minute drill block", "a fifty-minute spinal block", "_ fifty-minute serial block", "a fifth-minute serial block"
"a fifty-minute mental block" » "a fifty-minute detail block", "a fifty-minute men block", "a fifty-minute mental blocks", "a fifty-minute metal block", "a fifty-minute central block", "_ fifty-minute mental block", "a fifth-minute mental block"
"a fifty-minute bodies back" » "a fifty-finite bodies back", "a fifty-minute books back", "a fifty-minute bodies black", "a fifty-minute bodies crack", "a fifty-minute bodies bad", "_ fifty-minute bodies back", "a fifth-minute bodies back"
"a fifty-minute period back" » "a fifty-acute period back", "a fifty-minute per back", "a fifty-minute region back", "a fifty-minute period black", "a fifty-minute period batch", "a fifty-minute period bart", "_ fifty-minute period back", "a fifth-minute period back"
"a fifty-minute series stock" » "a fifty-minute services stock", "a fifty-minute series block", "a fifty-minute series stops", "_ fifty-minute series stock", "a fifth-minute series stock"

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 survey books") OR ("a fifty-minute sheriffs books"))) OR ((((((("a fifty-minute serial block") OR ("a fifty-minute mental block"))) OR ("a fifty-minute series stock"))) OR ((("a fifty-minute bodies back") OR ("a fifty-minute period back")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a fifty-minute survey books\") or (\"a fifty-minute sheriffs books\"))) or (((((((\"a fifty-minute serial block\") OR (\"a fifty-minute mental block\"))) or (\"a fifty-minute series stock\"))) or (((\"a fifty-minute bodies back\") or (\"a fifty-minute period back\"))))))".
• Removing quotes may allow a broader search: (((( a fifty-minute survey books ) or ( a fifty-minute sheriffs books ))) or ((((((( a fifty-minute serial block ) OR ( a fifty-minute mental block ))) or ( a fifty-minute series stock ))) or ((( a fifty-minute bodies back ) or ( a fifty-minute period back )))))).
• Adding a wildcard symbol may retrieve word variants: (((("a fifty-minute survey books") or ("a fifty-minute sheriffs books"))) or ((((((("a fifty-minute serial block") OR ("a fifty-minute mental block"))) or ("a fifty-minute series stock"))) or ((("a fifty-minute bodies back") or ("a fifty-minute period back"))))))*.