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

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 string ostensive"))) or ("1975 steering offensive"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("1975 string offensive") OR ("1975 string ostensive"))) OR ("1975 steering offensive")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"1975 string offensive\") OR (\"1975 string ostensive\"))) or (\"1975 steering offensive\"))".
• Removing quotes may allow a broader search: (((( 1975 string offensive ) OR ( 1975 string ostensive ))) or ( 1975 steering offensive )).
• Adding a wildcard symbol may retrieve word variants: (((("1975 string offensive") OR ("1975 string ostensive"))) or ("1975 steering offensive"))*.