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

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