Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronism swimming", "synchronize swimming"
"synchronised stemming" » "synchronized stemming", "synchronism stemming", "synchronize stemming", "synchronised flemming", "synchronised stepping", "synchronised stealing"
"synchronised steering" » "synchronized steering", "synchronism steering", "synchronize steering"
"synchronised streaming" » "synchronized streaming", "synchronism streaming", "synchronize streaming"
"synchronised treating" » "synchronized treating", "synchronism treating", "synchronize treating", "synchronised creating", "synchronised heating", "synchronised relating"

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 ((("synchronised streaming") or ("synchronised treating"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((((("synchronised stemming") OR ("synchronised steering"))) OR ((("synchronised streaming") OR ("synchronised treating")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((((\"synchronised stemming\") OR (\"synchronised steering\"))) or (((\"synchronised streaming\") or (\"synchronised treating\"))))))".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((( synchronised stemming ) OR ( synchronised steering ))) or ((( synchronised streaming ) or ( synchronised treating )))))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((("synchronised stemming") OR ("synchronised steering"))) or ((("synchronised streaming") or ("synchronised treating"))))))*.