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