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