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

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