Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronism swimming", "synchronising swimming"
"synchronized stemming" » "synchronized streaming", "synchronized steering", "synchronized flemming", "synchronismd stemming"
"synchronized swimming" » "synchronismd swimming"
"synchronize swimming" » "synchronism swimming"

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

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