Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronising swimming"
"synchronised stemming" » "synchronising stemming"
"synchronised stepping" » "synchronising stepping"
"synchronize flemming" » "synchronize fleming"

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 stepping") OR ("synchronized stepping"))))) OR ("synchronize flemming"))) OR ("synchronism stemming"))))~.
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((((( synchronised stemming ) or ((( synchronised stepping ) or ( synchronized stepping ))))) or ( synchronize flemming ))) or ( synchronism stemming ))))~.
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((((("synchronised stemming") or ((("synchronised stepping") or ("synchronized stepping"))))) or ("synchronize flemming"))) or ("synchronism stemming"))))*.