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