Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronised stemming"
"synchronising swimming" » "synchronising stemming", "synchronizing swimming", "synchronisations swimming"
"synchronism streaming" » "synchronized streaming", "synchronism treating"
"synchronize streaming" » "synchronize treating", "synchronized streaming", "synchronizing streaming"

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