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