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

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