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

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 ("synchronize stemming"))) or ("synchronism streaming"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronism swimming") OR ((((("synchronism stemming") OR ("synchronize stemming"))) OR ("synchronism streaming")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronism swimming\") or (((((\"synchronism stemming\") OR (\"synchronize stemming\"))) or (\"synchronism streaming\"))))".
• Removing quotes may allow a broader search: (( synchronism swimming ) or ((((( synchronism stemming ) OR ( synchronize stemming ))) or ( synchronism streaming )))).
• Adding a wildcard symbol may retrieve word variants: (("synchronism swimming") or ((((("synchronism stemming") OR ("synchronize stemming"))) or ("synchronism streaming"))))*.