Perhaps you should try some spelling variations:
david young » david loundy
yang study » yang judy, arg study
study gene » study gender, study genetic, study agency
mark david » mare davide, parker david
gene mark » gene bank, gene part, nene marc
yan yang » yang yang, yao yang, dan yang
choi » chi, cho

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 study gene mark david young choi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wing OR wan) yan yang study gene mark david young choi ;.
• Adding a wildcard symbol may retrieve word variants: (wing or wan) yan yang study gene mark david young choi ;*.