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

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