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

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

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