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"
"synchronised streaming" » "synchronism streaming", "synchronize streaming"
"synchronised treating" » "synchronism treating", "synchronize treating", "synchronised creating", "synchronised heating", "synchronised relating"
"synchronising treating" » "synchronising creating", "synchronising heating", "synchronising relating", "synchronizing treating", "synchronism treating", "synchronisations 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 ((((("synchronised streaming") or ("synchronized streaming"))) or ((("synchronised treating") OR ("synchronising treating"))))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((("synchronised stemming") OR ((((("synchronised streaming") OR ("synchronized streaming"))) OR ((("synchronised treating") OR ("synchronising treating"))))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((\"synchronised stemming\") or (((((\"synchronised streaming\") or (\"synchronized streaming\"))) or (((\"synchronised treating\") OR (\"synchronising treating\"))))))))*".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((( synchronised stemming ) or ((((( synchronised streaming ) or ( synchronized streaming ))) or ((( synchronised treating ) OR ( synchronising treating ))))))))*.