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