Perhaps you should try some spelling variations:
david young » david loundy
study gene » study gender, study genetic, study agency
gene tarr » gene part
young ghi » young choi, hong ghi, young get
tan yang » dan yang, tan ying, tan yong
yan yang » yang yang, dan yang, yan wang
yao yang » yang yang

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wing or wan) ((((yan yang) OR (tan yang))) or (yao yang)) study gene tarr david young ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wing OR wan) ((((yan yang) OR (tan yang))) OR (yao yang)) study gene tarr david young ghi ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wing or wan) ((((yan yang) OR (tan yang))) or (yao yang)) study gene tarr david young ghi ;*".