Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronize swimming", "synchronising swimming"
"synchronised stemming" » "synchronized stemming", "synchronize stemming", "synchronising stemming", "synchronised steering", "synchronised stepping", "synchronised stealing"
"synchronised streaming" » "synchronized streaming", "synchronize streaming", "synchronising streaming", "synchronised treating"
"synchronism flemming" » "synchronize flemming", "synchronising flemming", "synchronized flemming", "synchronism 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 ((((("synchronised stemming") or ("synchronised streaming"))) or ("synchronism flemming"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((((("synchronised stemming") OR ("synchronised streaming"))) OR ("synchronism flemming")))).
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((( synchronised stemming ) or ( synchronised streaming ))) or ( synchronism flemming )))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((("synchronised stemming") or ("synchronised streaming"))) or ("synchronism flemming"))))*.