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

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