Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronism swimming"
"synchronised steering" » "synchronism steering"
"synchronising swimming" » "synchronizing swimming", "synchronism swimming", "synchronisations swimming"
"synchronized stemming" » "synchronized streaming", "synchronized flemming", "synchronized stepping", "synchronismd stemming", "synchronizingd stemming"
"synchronize steering" » "synchronism steering", "synchronizing 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 ("synchronising swimming"))) or ((("synchronized stemming") or ((("synchronised steering") or ("synchronize steering"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("synchronised swimming") OR ("synchronising swimming"))) OR ((("synchronized stemming") OR ((("synchronised steering") OR ("synchronize steering")))))).
• Removing quotes may allow a broader search: (((( synchronised swimming ) or ( synchronising swimming ))) or ((( synchronized stemming ) or ((( synchronised steering ) or ( synchronize steering )))))).
• Adding a wildcard symbol may retrieve word variants: (((("synchronised swimming") or ("synchronising swimming"))) or ((("synchronized stemming") or ((("synchronised steering") or ("synchronize steering"))))))*.