Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronism swimming", "synchronising swimming"
"synchronised stemming" » "synchronized stemming", "synchronism stemming", "synchronising stemming"
"synchronised flemming" » "synchronized flemming", "synchronism flemming", "synchronising flemming"
"synchronised fleming" » "synchronized fleming", "synchronism fleming", "synchronising fleming"

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