Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronism swimming", "synchronising swimming", "synchronised stemming"
"synchronize swimming" » "synchronize stemming", "synchronism swimming", "synchronizing swimming"
"synchronized swimming" » "synchronized stemming", "synchronismd swimming", "synchronizingd swimming"
"synchronismd swimming" » "synchronismd stemming", "synchronism swimming", "synchronising 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 ((("synchronize swimming") or ((((("synchronized swimming") OR ("synchronismd swimming"))) or ("synchronismd swimming"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((("synchronize swimming") OR ((((("synchronized swimming") OR ("synchronismd swimming"))) OR ("synchronismd swimming")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((\"synchronize swimming\") or (((((\"synchronized swimming\") OR (\"synchronismd swimming\"))) or (\"synchronismd swimming\"))))))".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((( synchronize swimming ) or ((((( synchronized swimming ) OR ( synchronismd swimming ))) or ( synchronismd swimming )))))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((("synchronize swimming") or ((((("synchronized swimming") OR ("synchronismd swimming"))) or ("synchronismd swimming"))))))*.