Perhaps you should try some spelling variations:
"synchronized swimming" » "synchronismd swimming", "synchronizingd swimming"
"synchronize swimming" » "synchronism swimming", "synchronizing swimming"
"synchronised stemming" » "synchronism stemming", "synchronised steering", "synchronised flemming", "synchronised stepping"
"synchronised streaming" » "synchronism streaming"
"synchronising treating" » "synchronizing treating", "synchronism treating", "synchronisations treating", "synchronising creating", "synchronising heating", "synchronising relating"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("synchronized swimming") or ("synchronize swimming"))) or ((("synchronised stemming") or ((("synchronised streaming") or ("synchronising treating"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("synchronized swimming") OR ("synchronize swimming"))) OR ((("synchronised stemming") OR ((("synchronised streaming") OR ("synchronising treating")))))).
• Removing quotes may allow a broader search: (((( synchronized swimming ) or ( synchronize swimming ))) or ((( synchronised stemming ) or ((( synchronised streaming ) or ( synchronising treating )))))).
• Adding a wildcard symbol may retrieve word variants: (((("synchronized swimming") or ("synchronize swimming"))) or ((("synchronised stemming") or ((("synchronised streaming") or ("synchronising treating"))))))*.