Perhaps you should try some spelling variations:
"1975 spring offensive" » "1975 springer offensive", "1975 spring defensive", "1975 spring offense", "1975 spring ostensive"
"1975 spring offences" » "1975 springer offences", "1975 spring offence", "1975 spring offenders"
"1975 string offensive" » "1975 string defensive", "1975 string offense", "1975 string ostensive", "1975 strings offensive", "1975 steering offensive", "1975 striking offensive"

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: (((("1975 spring offensive") OR ("1975 string offensive"))) OR ("1975 spring offences"))~.
• Removing quotes may allow a broader search: (((( 1975 spring offensive ) or ( 1975 string offensive ))) or ( 1975 spring offences ))~.
• Adding a wildcard symbol may retrieve word variants: (((("1975 spring offensive") or ("1975 string offensive"))) or ("1975 spring offences"))*.