Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronize swimming", "synchronising swimming"
"synchronism stemming" » "synchronize stemming", "synchronising stemming", "synchronized stemming", "synchronism streaming", "synchronism steering", "synchronism stepping"
"synchronism flemming" » "synchronize flemming", "synchronising flemming", "synchronized flemming", "synchronism 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 ((("synchronism stemming") OR ("synchronism flemming"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((\"synchronism stemming\") OR (\"synchronism flemming\"))))~".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((( synchronism stemming ) OR ( synchronism flemming ))))~.
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((("synchronism stemming") OR ("synchronism flemming"))))*.