Perhaps you should try some spelling variations:
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
hua gene » human gene, a gene, hua ren
gene yan » gene bank, ren yan, see yan
wong sau » wong siu, wong shiu, wong lai
wong sam » wong lai, kong sar, von sam
yan kie » yang jie

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

• Performing a fuzzy search may retrieve terms with similar spellings: wing ((yao yang) or (((yang yang) or (wang yang)))) hua gene yan kie ((wong sau) OR (wong sam)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing ((yao yang) OR (((yang yang) OR (wang yang)))) hua gene yan kie ((wong sau) OR (wong sam)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wing ((yao yang) or (((yang yang) or (wang yang)))) hua gene yan kie ((wong sau) OR (wong sam)) ;".
• Adding a wildcard symbol may retrieve word variants: wing ((yao yang) or (((yang yang) or (wang yang)))) hua gene yan kie ((wong sau) OR (wong sam)) ;*.