Perhaps you should try some spelling variations:
"synchronisations swimming" » "synchronisation swimming", "synchronizations swimming", "synchronization swimming"
"synchronisations stemming" » "synchronisation stemming", "synchronizations stemming", "synchronization stemming", "synchronisations streaming", "synchronisations steering", "synchronisations flemming"
"synchronize swimming" » "synchronized swimming", "synchronism swimming", "synchronizing swimming"

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