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

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