Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronism swimming", "synchronize swimming", "synchronising swimming"
"synchronised stepping" » "synchronism stepping", "synchronize stepping", "synchronising stepping", "synchronised stopping", "synchronised shopping", "synchronised shipping"
"synchronised flemming" » "synchronism flemming", "synchronize flemming", "synchronising flemming", "synchronised fleming"
"synchronized stemming" » "synchronized streaming", "synchronized steering", "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 ((((("synchronised stepping") or ("synchronized stemming"))) or ("synchronised flemming"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((((("synchronised stepping") OR ("synchronized stemming"))) OR ("synchronised flemming")))).
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((( synchronised stepping ) or ( synchronized stemming ))) or ( synchronised flemming )))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((("synchronised stepping") or ("synchronized stemming"))) or ("synchronised flemming"))))*.