Perhaps you should try some spelling variations:
parker david » aaker david, tarr david, hauner david
mark david » mare davide
bank david » black david, bank ravi, park david
lang tan » liang tan, lang lang, tang tang
tan yang » dan yang, tan ying, tan yong
yang a1 » yang fan, yang yao, yang all
a1 gene » a gene, 1 gene, 11 gene
choi » chi, cho

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: lang tan yang a1 gene ((bank david) OR (((mark david) OR (parker david)))) young choi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang tan yang a1 gene ((bank david) or (((mark david) OR (parker david)))) young choi ;~".
• Adding a wildcard symbol may retrieve word variants: lang tan yang a1 gene ((bank david) or (((mark david) OR (parker david)))) young choi ;*.