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