Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronism swimming"
"synchronised stemming" » "synchronism stemming", "synchronised streaming", "synchronised steering", "synchronised flemming"
"synchronize stemming" » "synchronize streaming", "synchronize steering", "synchronize flemming", "synchronism stemming", "synchronizing stemming"
"synchronising stemming" » "synchronising streaming", "synchronising steering", "synchronising flemming", "synchronizing stemming", "synchronism stemming", "synchronisations stemming"
"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 ((((("synchronised stemming") OR ("synchronize stemming"))) or ("synchronising stemming"))))) or ("synchronized swimming"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("synchronised swimming") OR ((((("synchronised stemming") OR ("synchronize 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 (\"synchronize stemming\"))) or (\"synchronising stemming\"))))) or (\"synchronized swimming\"))".
• Removing quotes may allow a broader search: (((( synchronised swimming ) or ((((( synchronised stemming ) OR ( synchronize stemming ))) or ( synchronising stemming ))))) or ( synchronized swimming )).
• Adding a wildcard symbol may retrieve word variants: (((("synchronised swimming") or ((((("synchronised stemming") OR ("synchronize stemming"))) or ("synchronising stemming"))))) or ("synchronized swimming"))*.