Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronism swimming", "synchronize swimming", "synchronising swimming"
"synchronised stemming" » "synchronism stemming", "synchronize stemming", "synchronising stemming", "synchronised steering", "synchronised stealing", "synchronised stenning"
"synchronised streaming" » "synchronism streaming", "synchronize streaming", "synchronising streaming", "synchronised treating"
"synchronised stepping" » "synchronism stepping", "synchronize stepping", "synchronising stepping", "synchronised stopping", "synchronised shopping", "synchronised shipping"
"synchronised flemming" » "synchronism flemming", "synchronize flemming", "synchronising flemming", "synchronised fleming"
"synchronized streaming" » "synchronized treating"

You may be able to get more results by adjusting your search query.

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