Perhaps you should try some spelling variations:
"synchronisations swimming" » "synchronizations swimming", "synchronization swimming", "synchronising swimming", "synchronisations stemming", "synchronizationss swimming"
"synchronisation swimming" » "synchronisation stemming", "synchronization swimming", "synchronizations swimming"
"synchronized swimming" » "synchronized stemming"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("synchronisations swimming") OR ("synchronisation swimming"))) or ("synchronized swimming"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("synchronisations swimming") OR ("synchronisation swimming"))) OR ("synchronized swimming")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"synchronisations swimming\") OR (\"synchronisation swimming\"))) or (\"synchronized swimming\"))".
• Removing quotes may allow a broader search: (((( synchronisations swimming ) OR ( synchronisation swimming ))) or ( synchronized swimming )).
• Adding a wildcard symbol may retrieve word variants: (((("synchronisations swimming") OR ("synchronisation swimming"))) or ("synchronized swimming"))*.