Perhaps you should try some spelling variations:
"1975 string offensive" » "1975 spring offensive", "1975 steering offensive", "1975 striking offensive", "1975 string defensive", "1975 string offense"
"1975 strings offensive" » "1975 springs offensive", "1975 steerings offensive", "1975 strikings offensive", "1975 strings defensive", "1975 strings offense", "1975 settings offensive"
"1975 strings ostensive" » "1975 springs ostensive", "1975 steerings ostensive", "1975 strikings ostensive", "1975 settings ostensive", "1975 strings extensive", "1975 strings 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 strings offensive") OR ("1975 strings ostensive"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("1975 string offensive") OR ((("1975 strings offensive") OR ("1975 strings ostensive")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"1975 string offensive\") or (((\"1975 strings offensive\") OR (\"1975 strings ostensive\"))))".
• Removing quotes may allow a broader search: (( 1975 string offensive ) or ((( 1975 strings offensive ) OR ( 1975 strings ostensive )))).
• Adding a wildcard symbol may retrieve word variants: (("1975 string offensive") or ((("1975 strings offensive") OR ("1975 strings ostensive"))))*.