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