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