Perhaps you should try some spelling variations:
german gender » german lander, germany under, german border
human gender » bhutan gender, human gene, human genome
yang jin » yang jie, yang jun, shang jin
ying jin » jing ji, yang jie
long shu » cong shu, tong shui, long du
yan tan » tan tan, yan clan, yan guan
wang » wing, wan, lang

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 yan tan ((human gender) OR (german gender)) ((yang jin) OR (ying jin)) long shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan tan ((human gender) OR (german gender)) ((yang jin) or (ying jin)) long shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan tan ((human gender) OR (german gender)) ((yang jin) or (ying jin)) long shu ;*.