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

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