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

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 streaming") OR ("synchronising streaming"))) OR ("synchronised flemming"))) OR ("synchronism stemming"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((((((\"synchronised streaming\") OR (\"synchronising streaming\"))) or (\"synchronised flemming\"))) or (\"synchronism stemming\"))))~".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((((( synchronised streaming ) OR ( synchronising streaming ))) or ( synchronised flemming ))) or ( synchronism stemming ))))~.
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((((("synchronised streaming") OR ("synchronising streaming"))) or ("synchronised flemming"))) or ("synchronism stemming"))))*.