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

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 ("synchronismd swimming"))) or ("synchronismd swimming"))))) or ("synchronism swimming"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("synchronised swimming") OR ((((("synchronized swimming") OR ("synchronismd swimming"))) OR ("synchronismd swimming"))))) OR ("synchronism swimming")).
• Removing quotes may allow a broader search: (((( synchronised swimming ) or ((((( synchronized swimming ) or ( synchronismd swimming ))) or ( synchronismd swimming ))))) or ( synchronism swimming )).
• Adding a wildcard symbol may retrieve word variants: (((("synchronised swimming") or ((((("synchronized swimming") or ("synchronismd swimming"))) or ("synchronismd swimming"))))) or ("synchronism swimming"))*.