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

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