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

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