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

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