Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronising swimming"
"synchronised stemming" » "synchronized stemming", "synchronising stemming", "synchronised streaming", "synchronised steering", "synchronised stepping"
"synchronised flemming" » "synchronized flemming", "synchronising flemming", "synchronised fleming"
"synchronize swimming" » "synchronized swimming", "synchronizing swimming"
"synchronism stemming" » "synchronism streaming", "synchronism steering", "synchronism stepping", "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 ("synchronize swimming"))) or ((((("synchronised stemming") or ("synchronised flemming"))) or ("synchronism stemming"))))~.
• 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 ("synchronism stemming")))).
• 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 (\"synchronism stemming\"))))".
• Removing quotes may allow a broader search: (((( synchronised swimming ) OR ( synchronize swimming ))) or ((((( synchronised stemming ) or ( synchronised flemming ))) or ( synchronism stemming )))).
• Adding a wildcard symbol may retrieve word variants: (((("synchronised swimming") OR ("synchronize swimming"))) or ((((("synchronised stemming") or ("synchronised flemming"))) or ("synchronism stemming"))))*.