Perhaps you should try some spelling variations:
gender codes » gender cops, gender index, gender order
gender class » gender biases, gender bias
wang yang » wang yan, wang liang, wang yanling
yang dan » yang dean, yang fan, wang dan
mali der » mari der, modi der, aji der
dan e » dan er, dan we, dan z
spur » sur

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang dan e ((gender codes) OR (gender class)) mali der spur ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang dan e ((gender codes) OR (gender class)) mali der spur ;*.