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

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

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