Perhaps you should try some spelling variations:
"synchronize swimming" » "synchronism swimming", "synchronizing swimming"
"synchronized swimming" » "synchronismd swimming", "synchronizingd swimming"
"synchronized stemming" » "synchronismd stemming", "synchronizingd stemming", "synchronized steering", "synchronized flemming", "synchronized stepping"
"synchronize streaming" » "synchronism streaming", "synchronizing streaming", "synchronize treating"

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

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