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

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

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