Perhaps you should try some spelling variations:
"1975 string offensive" » "1975 strings offensive", "1975 striking offensive", "1975 string defensive", "1975 string offense", "1975 string ostensive"
"1975 steering offensive" » "1975 steering defensive", "1975 steering offense", "1975 steering ostensive"
"1975 spring offensive" » "1975 spring defensive", "1975 spring offense", "1975 spring ostensive", "1975 springer 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 string offensive") OR ("1975 steering offensive"))) OR ("1975 spring offensive"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"1975 string offensive\") OR (\"1975 steering offensive\"))) or (\"1975 spring offensive\"))~".
• Removing quotes may allow a broader search: (((( 1975 string offensive ) OR ( 1975 steering offensive ))) or ( 1975 spring offensive ))~.
• Adding a wildcard symbol may retrieve word variants: (((("1975 string offensive") OR ("1975 steering offensive"))) or ("1975 spring offensive"))*.