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"
"synchronism stemming" » "synchronism streaming", "synchronism steering", "synchronism stepping", "synchronize stemming", "synchronising stemming"
"synchronized flemming" » "synchronized fleming"

You may be able to get more results by adjusting your search query.

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