Perhaps you should try some spelling variations:
yuan wang » yan wang, yuan kang, yuan chang
yang zili » yang dali
210 david » 2005 david, 2009 david, 2017 david
mant hai » dang hai
yang li » yang lin, yang di, yang xi
i david » die david, iii david, shi david
2 david » 2.1 david, 226 david, de david

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: yuan wang ((yang zili) OR (yang li)) reform ((i david) OR (((2 david) OR (210 david)))) mant hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yuan wang ((yang zili) or (yang li)) reform ((i david) or (((2 david) OR (210 david)))) mant hai ;~".
• Adding a wildcard symbol may retrieve word variants: yuan wang ((yang zili) or (yang li)) reform ((i david) or (((2 david) OR (210 david)))) mant hai ;*.