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