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

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

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