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