Perhaps you should try some spelling variations:
jeong yeon » jeong hyeok, jeang yean, seung yeon
wang liang » wang yang
yang yang » wang yang, wang yan
gene yang » gene bank
jeong seo » hong seo, jeong su
hua gene » human gene, a gene, hua ren
yang jin » yang jie, yang jun, ying jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) or (wang liang)) ya hua gene yang jin ((jeong seo) or (jeong yeon)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (wang liang)) ya hua gene yang jin ((jeong seo) OR (jeong yeon)) ;.
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (wang liang)) ya hua gene yang jin ((jeong seo) or (jeong yeon)) ;*.