Perhaps you should try some spelling variations:
"synchronised stemming" » "synchronism stemming", "synchronised streaming", "synchronised steering", "synchronised flemming"
"synchronize swimming" » "synchronism swimming", "synchronizing swimming"
"synchronized swimming" » "synchronismd swimming", "synchronizingd swimming"
"synchronising swimming" » "synchronizing swimming", "synchronism swimming", "synchronisations 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 swimming") or ("synchronized swimming"))) or ("synchronising swimming"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised stemming") OR ((((("synchronize swimming") OR ("synchronized swimming"))) OR ("synchronising swimming")))).
• Removing quotes may allow a broader search: (( synchronised stemming ) or ((((( synchronize swimming ) or ( synchronized swimming ))) or ( synchronising swimming )))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised stemming") or ((((("synchronize swimming") or ("synchronized swimming"))) or ("synchronising swimming"))))*.