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

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 steering"))))) or ("synchronising swimming"))) or ("synchronized swimming"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("synchronised swimming") OR ((("synchronised stemming") OR ("synchronised steering"))))) OR ("synchronising swimming"))) OR ("synchronized swimming"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"synchronised swimming\") or (((\"synchronised stemming\") OR (\"synchronised steering\"))))) or (\"synchronising swimming\"))) or (\"synchronized swimming\"))*".
• Removing quotes may allow a broader search: (((((( synchronised swimming ) or ((( synchronised stemming ) OR ( synchronised steering ))))) or ( synchronising swimming ))) or ( synchronized swimming ))*.