Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronising swimming"
"synchronize stemming" » "synchronizing stemming", "synchronize streaming", "synchronize steering", "synchronize stepping"
"synchronized stemming" » "synchronizingd stemming", "synchronized streaming", "synchronized steering", "synchronized stepping"
"synchronized flemming" » "synchronizingd flemming", "synchronized fleming"
"synchronism stemming" » "synchronism streaming", "synchronism steering", "synchronism stepping", "synchronising 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 ((((("synchronize stemming") or ("synchronism stemming"))) or ((("synchronized stemming") OR ("synchronized flemming"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((((("synchronize stemming") OR ("synchronism stemming"))) OR ((("synchronized stemming") OR ("synchronized flemming")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((((\"synchronize stemming\") or (\"synchronism stemming\"))) or (((\"synchronized stemming\") OR (\"synchronized flemming\"))))))".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((( synchronize stemming ) or ( synchronism stemming ))) or ((( synchronized stemming ) OR ( synchronized flemming )))))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((("synchronize stemming") or ("synchronism stemming"))) or ((("synchronized stemming") OR ("synchronized flemming"))))))*.