Perhaps you should try some spelling variations:
gene yang » gene bank
wang ban » wang yan, wang yang, bang bang
wang dan » wang yan, wang yidan, wang yang
jing guo » xin guo
guo gene » guo feng
yang jin » yang jie, yang jun, ying jin
song seo » hong seo, song seng, kong sek
song so » song von

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: ((wang ban) OR (wang dan)) jing guo gene yang jin ((song seo) OR (song so)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang ban) or (wang dan)) jing guo gene yang jin ((song seo) OR (song so)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang ban) or (wang dan)) jing guo gene yang jin ((song seo) OR (song so)) ;*.