Perhaps you should try some spelling variations:
"synchronised stemming" » "synchronism stemming", "synchronising stemming", "synchronised streaming", "synchronised flemming", "synchronised stepping"
"synchronised steering" » "synchronism steering", "synchronising steering"
"synchronized swimming" » "synchronismd swimming", "synchronizingd swimming"
"synchronize swimming" » "synchronism swimming", "synchronizing 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 stemming") OR ("synchronised steering"))) or ("synchronized swimming"))) or ("synchronize swimming"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("synchronised stemming") OR ("synchronised steering"))) OR ("synchronized swimming"))) OR ("synchronize swimming")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"synchronised stemming\") OR (\"synchronised steering\"))) or (\"synchronized swimming\"))) or (\"synchronize swimming\"))".
• Removing quotes may allow a broader search: (((((( synchronised stemming ) OR ( synchronised steering ))) or ( synchronized swimming ))) or ( synchronize swimming )).
• Adding a wildcard symbol may retrieve word variants: (((((("synchronised stemming") OR ("synchronised steering"))) or ("synchronized swimming"))) or ("synchronize swimming"))*.