Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronism swimming", "synchronising swimming", "synchronised stemming"
"synchronised steering" » "synchronized steering", "synchronism steering", "synchronising steering"
"synchronize streaming" » "synchronized streaming", "synchronism streaming", "synchronizing streaming", "synchronize treating"
"synchronize stepping" » "synchronized stepping", "synchronism stepping", "synchronizing stepping", "synchronize stopping", "synchronize shopping", "synchronize shipping"

You may be able to get more results by adjusting your search query.

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