Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
dong yang » dong hoang, wang yang, dan yang
one small » some small
tan yang » dan yang, tan ying, tan yong
one many » one man, one money, one man's
one may » one man, one day, one mark
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 ((yang yang) OR (((dong yang) OR (tan yang)))) a gene ((one many) OR (one may)) one small ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang yang) or (((dong yang) or (tan yang)))) a gene ((one many) OR (one may)) one small ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yang yang) or (((dong yang) or (tan yang)))) a gene ((one many) OR (one may)) one small ;*.