Perhaps you should try some spelling variations:
"1975 spring offensive" » "1975 string offensive", "1975 springer offensive", "1975 spring defensive", "1975 spring offense"
"1975 spring ostensive" » "1975 string ostensive", "1975 springer ostensive", "1975 spring extensive", "1975 spring intensive"
"1975 strings ostensive" » "1975 strings extensive", "1975 strings intensive", "1975 settings ostensive"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("1975 spring offensive") or ((("1975 spring ostensive") or ("1975 strings ostensive"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("1975 spring offensive") OR ((("1975 spring ostensive") OR ("1975 strings ostensive")))).
• Removing quotes may allow a broader search: (( 1975 spring offensive ) or ((( 1975 spring ostensive ) or ( 1975 strings ostensive )))).
• Adding a wildcard symbol may retrieve word variants: (("1975 spring offensive") or ((("1975 spring ostensive") or ("1975 strings ostensive"))))*.