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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("synchronising swimming") or ((((("synchronised stemming") or ("synchronized stemming"))) or ("synchronised steering"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronising swimming") OR ((((("synchronised stemming") OR ("synchronized stemming"))) OR ("synchronised steering")))).
• Removing quotes may allow a broader search: (( synchronising swimming ) or ((((( synchronised stemming ) or ( synchronized stemming ))) or ( synchronised steering )))).
• Adding a wildcard symbol may retrieve word variants: (("synchronising swimming") or ((((("synchronised stemming") or ("synchronized stemming"))) or ("synchronised steering"))))*.