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