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