Perhaps you should try some spelling variations:
"single domains" » "single domain", "finite domains"
"single chains" » "single chain", "single channel", "single chip"
"singie chain" » "single chain", "side chain", "single chip"

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