Perhaps you should try some spelling variations:
"synchronisations swimming" » "synchronisation swimming", "synchronizations swimming", "synchronization swimming", "synchronisations stemming"
"synchronised steering" » "synchronism steering", "synchronize steering", "synchronising steering"
"synchronised streaming" » "synchronism streaming", "synchronize streaming", "synchronising streaming", "synchronised treating"
"synchronized streaming" » "synchronized treating"

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

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