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

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

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