Perhaps you should try some spelling variations:
yala human » data human, malawi human
dong hoang » hong hong
human gene » human genome, human gender, human bone
wang yang » wang liang, wang yanling
gene yang » gene bank
dean wong » dead long
wong yue » wang yue, hong yu
yang » ryang
yan » ryan

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 yang) OR (dong hoang))) OR (wang yan)) yala human gene yang dean wong yue ;~.
• Adding a wildcard symbol may retrieve word variants: ((((wang yang) or (dong hoang))) or (wang yan)) yala human gene yang dean wong yue ;*.