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

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 ((("synchronized stemming") OR ((("synchronism stemming") OR ((("synchronism flemming") OR ("synchronising flemming"))))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((\"synchronized stemming\") or (((\"synchronism stemming\") or (((\"synchronism flemming\") OR (\"synchronising flemming\"))))))))~".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((( synchronized stemming ) or ((( synchronism stemming ) or ((( synchronism flemming ) OR ( synchronising flemming ))))))))~.
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((("synchronized stemming") or ((("synchronism stemming") or ((("synchronism flemming") OR ("synchronising flemming"))))))))*.