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

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 ((((("synchronised streaming") OR ((("synchronised steering") OR ("synchronize steering"))))) OR ("synchronism stemming"))))~.
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((( synchronised streaming ) or ((( synchronised steering ) or ( synchronize steering ))))) or ( synchronism stemming ))))~.
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((("synchronised streaming") or ((("synchronised steering") or ("synchronize steering"))))) or ("synchronism stemming"))))*.