Perhaps you should try some spelling variations:
yang human » facing human
gene clone » gene one
wang yang » wang yan, wang liang, wang yanling
gene long » gene one
han heung » hin cheung, han kyung
heung sau » heung wah
yan wang » yuan wang, yang yang, qian wang

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

• Performing a fuzzy search may retrieve terms with similar spellings: yan wang yang human ((gene long) or (gene clone)) han heung sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yan wang yang human ((gene long) OR (gene clone)) han heung sau ;.
• Adding a wildcard symbol may retrieve word variants: yan wang yang human ((gene long) or (gene clone)) han heung sau ;*.