Perhaps you should try some spelling variations:
german gender » german lander, germany under, german border
human gender » bhutan gender, human gene, human genome
yang jie » yang jin, yang di, yang jui
hong shu » cong shu, tong shui, wong shiu
yan jiu » yang jin, pang jiu
so ya » so a
done » one

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

• Performing a fuzzy search may retrieve terms with similar spellings: done so ya ((human gender) OR (german gender)) ((yan jiu) or (yang jie)) hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: done so ya ((human gender) OR (german gender)) ((yan jiu) OR (yang jie)) hong shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "done so ya ((human gender) OR (german gender)) ((yan jiu) or (yang jie)) hong shu ;*".