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