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