Perhaps you should try some spelling variations:
"single domains" » "single domain", "finite domains", "single chains"
"synfire chain" » "synfire chains", "entire chain", "singie chain"
"singie chains" » "single chains", "singie chain", "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 ("singie chains"))) OR ("single domains")).
• Removing quotes may allow a broader search: (((( synfire chain ) or ( singie chains ))) or ( single domains )).
• Adding a wildcard symbol may retrieve word variants: (((("synfire chain") or ("singie chains"))) or ("single domains"))*.