Perhaps you should try some spelling variations:
yuan chang » yuan cheng, huang chang, han chang
gene clone » gene one
yuan wang » yan wang, yuan kang, qian wang
yang hui » yang jui, wang hui, yang muxi
tan kong » tan hong
yang yi » yang di, yang xi, yang jui
sar » sara, star, saur

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: ((yuan wang) OR (yuan chang)) ((yang hui) OR (yang yi)) gene clone tan kong sar ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yuan wang) OR (yuan chang)) ((yang hui) or (yang yi)) gene clone tan kong sar ;~".
• Adding a wildcard symbol may retrieve word variants: ((yuan wang) OR (yuan chang)) ((yang hui) or (yang yi)) gene clone tan kong sar ;*.