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

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