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

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