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

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