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

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 streaming") or ("synchronized flemming"))) or ("synchronism stemming"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((((("synchronised streaming") OR ("synchronized flemming"))) OR ("synchronism stemming")))).
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((( synchronised streaming ) or ( synchronized flemming ))) or ( synchronism stemming )))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((("synchronised streaming") or ("synchronized flemming"))) or ("synchronism stemming"))))*.