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

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 springer offensive"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"1975 spring offensive\") OR (\"1975 string offensive\"))) or (\"1975 springer offensive\"))~".
• Removing quotes may allow a broader search: (((( 1975 spring offensive ) OR ( 1975 string offensive ))) or ( 1975 springer offensive ))~.
• Adding a wildcard symbol may retrieve word variants: (((("1975 spring offensive") OR ("1975 string offensive"))) or ("1975 springer offensive"))*.