Perhaps you should try some spelling variations:
"synchronism swimming" » "synchronize swimming", "synchronising swimming", "synchronized swimming"
"synchronism stemming" » "synchronize stemming", "synchronising stemming", "synchronized stemming", "synchronism steering", "synchronism flemming", "synchronism stepping"
"synchronism streaming" » "synchronize streaming", "synchronising streaming", "synchronized streaming", "synchronism treating"

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

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