Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronized swimming", "synchronism swimming", "synchronising swimming"
"synchronised stemming" » "synchronized stemming", "synchronism stemming", "synchronising stemming", "synchronised stepping", "synchronised stealing", "synchronised stenning"
"synchronised flemming" » "synchronized flemming", "synchronism flemming", "synchronising flemming", "synchronised fleming"
"synchronised streaming" » "synchronized streaming", "synchronism streaming", "synchronising streaming", "synchronised treating"
"synchronize steering" » "synchronized steering", "synchronism 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: (("synchronised swimming") or ((((((("synchronised stemming") or ("synchronised flemming"))) or ("synchronised streaming"))) or ("synchronize steering"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((((((("synchronised stemming") OR ("synchronised flemming"))) OR ("synchronised streaming"))) OR ("synchronize steering")))).
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((((( synchronised stemming ) or ( synchronised flemming ))) or ( synchronised streaming ))) or ( synchronize steering )))).
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((((("synchronised stemming") or ("synchronised flemming"))) or ("synchronised streaming"))) or ("synchronize steering"))))*.