Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
gene gene » gene meme, gene one, one gene
yang hua » wang hua, yang hui, yang jui
ying hua » ming hua, wang hua, ying zhu
yang yi » yang di, yang jui
yang xi » yang di, yang jui
gene 2 » gene _, gene m, gene 1
2 wang » 2 zwang, _ wang, x wang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yi) or (yang yang)) ((((yang hua) or (ying hua))) or (yang xi)) gene gene 2 wang zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yi) OR (yang yang)) ((((yang hua) OR (ying hua))) OR (yang xi)) gene gene 2 wang zhi ;.
• Adding a wildcard symbol may retrieve word variants: ((yang yi) or (yang yang)) ((((yang hua) or (ying hua))) or (yang xi)) gene gene 2 wang zhi ;*.