Perhaps you should try some spelling variations:
gender codes » gender cops, gender class, gender index
cavell die » havel die
wang yong » wang hyoung, wang yan, wang shiyong
wang yang » wang yan, wang liang, wang yanling
call die » call date, call me, soll die
yan 2 » yan _
yan 4 » yang 4, yan _, ban 4

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: ((wang yong) OR (wang yang)) ((yan 2) OR (yan 4)) gender codes ((call die) OR (cavell die)) spur ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yong) or (wang yang)) ((yan 2) or (yan 4)) gender codes ((call die) OR (cavell die)) spur ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yong) or (wang yang)) ((yan 2) or (yan 4)) gender codes ((call die) OR (cavell die)) spur ;*.