Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronism swimming", "synchronize swimming", "synchronised stemming"
"synchronised stepping" » "synchronized stepping", "synchronism stepping", "synchronize stepping", "synchronised stopping", "synchronised shopping", "synchronised shipping"
"synchronised flemming" » "synchronized flemming", "synchronism flemming", "synchronize flemming", "synchronised fleming"
"synchronised streaming" » "synchronized streaming", "synchronism streaming", "synchronize streaming", "synchronised treating"

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 stepping"))) or ((("synchronised flemming") or ("synchronised streaming"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("synchronised swimming") OR ("synchronised stepping"))) OR ((("synchronised flemming") OR ("synchronised streaming")))).
• Removing quotes may allow a broader search: (((( synchronised swimming ) or ( synchronised stepping ))) or ((( synchronised flemming ) or ( synchronised streaming )))).
• Adding a wildcard symbol may retrieve word variants: (((("synchronised swimming") or ("synchronised stepping"))) or ((("synchronised flemming") or ("synchronised streaming"))))*.