Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming"
"synchronised streaming" » "synchronized streaming", "synchronised treating"
"synchronize stemming" » "synchronized stemming", "synchronizing stemming", "synchronize steering", "synchronize flemming", "synchronize stepping"
"synchronism stemming" » "synchronism steering", "synchronism flemming", "synchronism stepping", "synchronized stemming"
"synchronising stemming" » "synchronising steering", "synchronising flemming", "synchronising stepping", "synchronizing stemming", "synchronisations stemming"

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