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

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