Perhaps you should try some spelling variations:
german gender » german lander, germany under, german border
human gender » bhutan gender, human gene, human genome
wan yanling » wang yanling, wang yangming, wang danning
yanling a » handling a, calling a, falling a
sang mich » sang minh
mich dann » ich dann, mich das

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: wan yanling a ((human gender) OR (german gender)) sang mich dann (hai OR haji) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yanling a ((human gender) OR (german gender)) sang mich dann (hai or haji) ;~".
• Adding a wildcard symbol may retrieve word variants: wan yanling a ((human gender) OR (german gender)) sang mich dann (hai or haji) ;*.