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"
"synchronized steering" » "synchronismd steering", "synchronizingd steering"

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