Perhaps you should try some spelling variations:
"18 summer olympics boycott" » "18 summer olympic boycott", "1 summer olympics boycott", "15 summer olympics boycott", "17 summer olympics boycott", "18 summer olympics boycotts"
"10 summer olympics boycott" » "10 summer olympic boycott", "10 summery olympics boycott", "1 summer olympics boycott", "30 summer olympics boycott", "10 summer olympics boycotts"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"18 summer olympics boycott\") OR (\"10 summer olympics boycott\"))".
• Removing quotes may allow a broader search: (( 18 summer olympics boycott ) OR ( 10 summer olympics boycott )).
• Adding a wildcard symbol may retrieve word variants: (("18 summer olympics boycott") OR ("10 summer olympics boycott"))*.