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