Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
gene tang » gene bank
tan yang » dan yang, tan ying, tao yang
tan yong » tan hong, tan kong, tan ying
min hong » amin hong, tin hong, min hyoung
thi hong » tan hong
a gene » a genre, a gender, a gentle

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 ((((tan yang) OR (tan yong))) OR (yang yang)) a gene tang ((min hong) OR (thi hong)) hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((((tan yang) OR (tan yong))) or (yang yang)) a gene tang ((min hong) or (thi hong)) hai ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((((tan yang) OR (tan yong))) or (yang yang)) a gene tang ((min hong) or (thi hong)) hai ;*.