Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronism 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"
"synchronising steering" » "synchronizing steering", "synchronism steering", "synchronisations 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 ("synchronising steering"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((((("synchronize stemming") OR ("synchronize flemming"))) OR ("synchronising steering")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((((\"synchronize stemming\") OR (\"synchronize flemming\"))) or (\"synchronising steering\"))))".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((( synchronize stemming ) OR ( synchronize flemming ))) or ( synchronising steering )))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((("synchronize stemming") OR ("synchronize flemming"))) or ("synchronising steering"))))*.