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

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

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