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

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