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

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