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

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 stepping"))) or ((("synchronised streaming") or ("synchronize streaming"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((((("synchronised stemming") OR ("synchronised stepping"))) OR ((("synchronised streaming") OR ("synchronize streaming")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((((\"synchronised stemming\") OR (\"synchronised stepping\"))) or (((\"synchronised streaming\") or (\"synchronize streaming\"))))))".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((( synchronised stemming ) OR ( synchronised stepping ))) or ((( synchronised streaming ) or ( synchronize streaming )))))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((("synchronised stemming") OR ("synchronised stepping"))) or ((("synchronised streaming") or ("synchronize streaming"))))))*.