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

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

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