Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
one small » some small
gene one » gene clone, gene gene, gene we
one gene » gene gene, one agent, e gene
yan yan » yan yuan, nan yan, wang yan
tan one » than one, can one, man one
wang » wing, wan, lang

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 ((yan yan) OR (yang yang)) a ((gene one) OR (one gene)) tan one small ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((yan yan) or (yang yang)) a ((gene one) or (one gene)) tan one small ;*.