Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronism swimming"
"synchronised stemming" » "synchronized stemming", "synchronism stemming"
"synchronised streaming" » "synchronized streaming", "synchronism streaming", "synchronised treating"
"synchronising stemming" » "synchronizing stemming", "synchronism stemming", "synchronisations stemming"

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