Perhaps you should try some spelling variations:
"synfire chain" » "synfire chains", "entire chain", "singie chain"
"single chains" » "single chain", "single domains", "single class"
"single charge" » "single chain", "single case", "single target"
"single chip" » "single chain"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("synfire chain") OR ((((((("single chains") OR ("single charge"))) OR ("single chip"))) OR ("single channel")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synfire chain\") or (((((((\"single chains\") OR (\"single charge\"))) or (\"single chip\"))) or (\"single channel\"))))".
• Removing quotes may allow a broader search: (( synfire chain ) or ((((((( single chains ) OR ( single charge ))) or ( single chip ))) or ( single channel )))).
• Adding a wildcard symbol may retrieve word variants: (("synfire chain") or ((((((("single chains") OR ("single charge"))) or ("single chip"))) or ("single channel"))))*.