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"

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 ("synchronized swimming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"synchronised swimming\") OR (((\"synchronised stemming\") OR (\"synchronising stemming\"))))) OR (\"synchronized swimming\"))".
• Removing quotes may allow a broader search: (((( synchronised swimming ) OR ((( synchronised stemming ) OR ( synchronising stemming ))))) OR ( synchronized swimming )).
• Adding a wildcard symbol may retrieve word variants: (((("synchronised swimming") OR ((("synchronised stemming") OR ("synchronising stemming"))))) OR ("synchronized swimming"))*.