Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronism swimming"
"synchronised stemming" » "synchronism stemming", "synchronised steering", "synchronised flemming", "synchronised stepping"
"synchronised streaming" » "synchronism streaming"
"synchronize swimming" » "synchronism swimming", "synchronizing swimming"
"synchronized swimming" » "synchronismd swimming", "synchronizingd swimming"
"synchronising treating" » "synchronizing treating", "synchronism treating", "synchronisations treating", "synchronising creating", "synchronising heating", "synchronising relating"

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