Perhaps you should try some spelling variations:
german gender » german lander, germany under, german border
human gender » bhutan gender, human genome, human guided
human gene » human genome, human bone, human genetic
yao ming » yuan ming, yao yang, guo ming
les hong » le hong, does hong, law hong
i les » ii les, 2 les, 1 les

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wan or lang) yao ming ((human gene) or (((human gender) OR (german gender)))) i les hong seo ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wan OR lang) yao ming ((human gene) OR (((human gender) OR (german gender)))) i les hong seo ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wan or lang) yao ming ((human gene) or (((human gender) OR (german gender)))) i les hong seo ;".
• Adding a wildcard symbol may retrieve word variants: (wan or lang) yao ming ((human gene) or (((human gender) OR (german gender)))) i les hong seo ;*.