Perhaps you should try some spelling variations:
human gender » bhutan gender, german gender, human genome
human gene » human genome, human bone, human genetic
dong nan » dong yang, dong bin, dong cao
yang jin » yang jie, ying jin, shang jin
yang jun » yang jui, pang jun, yang judy
long shu » cong shu, tong shui, long du

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong nan) or (dong sin)) 2 ((human gene) OR (human gender)) ((yang jin) or (yang jun)) long shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong nan) OR (dong sin)) 2 ((human gene) OR (human gender)) ((yang jin) OR (yang jun)) long shu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong nan) or (dong sin)) 2 ((human gene) OR (human gender)) ((yang jin) or (yang jun)) long shu ;".
• Adding a wildcard symbol may retrieve word variants: ((dong nan) or (dong sin)) 2 ((human gene) OR (human gender)) ((yang jin) or (yang jun)) long shu ;*.