Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang fan » zhang fan, yang dean, yang yang
one gene » gene gene, one agent, e gene
gene one » gene clone, gene gene, gene we
und abu » und tabu, und ab, und abbau
und abs » und ab
fan a » fang a, can a, fan _

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 yang fan a ((one gene) OR (gene one)) gang ((und abu) OR (und abs)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang fan a ((one gene) or (gene one)) gang ((und abu) or (und abs)) ;*.