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