Perhaps you should try some spelling variations:
khan hafiz » khan hadi
wan hyoung » wang hyoung, min hyoung, hwang byoung
gene yang » gene bank
yang chik » nong chik, wang chi
hang hadi » dang hai, khan hadi, shang hai
hua gene » human gene, a gene, hua ren
kim hua » kim hyun

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 hyoung) OR (man houng)) kim hua gene yang chik ((hang hadi) OR (khan hafiz)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((wan hyoung) or (man houng)) kim hua gene yang chik ((hang hadi) or (khan hafiz)) ;*.