Perhaps you should try some spelling variations:
"synchronised stemming" » "synchronize stemming", "synchronising stemming", "synchronised steering", "synchronised stepping", "synchronised stealing"
"synchronised streaming" » "synchronize streaming", "synchronising streaming", "synchronised treating"
"synchronism stemming" » "synchronism steering", "synchronism stepping", "synchronism stealing", "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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronized swimming") OR ((((("synchronised stemming") OR ("synchronised streaming"))) OR ((("synchronism stemming") OR ("synchronism flemming"))))))~.
• Removing quotes may allow a broader search: (( synchronized swimming ) or ((((( synchronised stemming ) or ( synchronised streaming ))) or ((( synchronism stemming ) or ( synchronism flemming ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("synchronized swimming") or ((((("synchronised stemming") or ("synchronised streaming"))) or ((("synchronism stemming") or ("synchronism flemming"))))))*.