Perhaps you should try some spelling variations:
synfire chain » synfire chains, entire chain, synfue chains
single chains » single channel, single domains, single charge
singie chain » side chain, ising chain, using chain
single chain » single channel

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 ( ((singie chain) OR (single chain)) ))) OR ( ((single chains) OR (single chip)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( synfire chain ) or ( ((singie chain) or (single chain)) ))) or ( ((single chains) OR (single chip)) ))".
• Adding a wildcard symbol may retrieve word variants: (((( synfire chain ) or ( ((singie chain) or (single chain)) ))) or ( ((single chains) OR (single chip)) ))*.