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 steering" » "synchronismd steering", "synchronizingd steering"
"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 ((("synchronised stemming") or ((((("synchronised steering") OR ("synchronized steering"))) or ("synchronize steering"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((("synchronised stemming") OR ((((("synchronised steering") OR ("synchronized steering"))) OR ("synchronize steering"))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((\"synchronised stemming\") or (((((\"synchronised steering\") OR (\"synchronized steering\"))) or (\"synchronize steering\"))))))*".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((( synchronised stemming ) or ((((( synchronised steering ) OR ( synchronized steering ))) or ( synchronize steering ))))))*.