Perhaps you should try some spelling variations:
wang zheng » tang zheng, wang zhenpo, fang sheng
wang tang » wang yang, wang liang, wang yan
tang tang » taizong tang
yuan yi » yuan zi, yuan fei, yuan hui
yuan li » yuan lin, guan li, yuan zi
yang xi » yang di, yang yi, yang jui
xi wang » x wang, li wang, xi kang

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 tang) OR (tang tang)) min ((yuan yi) OR (yuan li)) yang xi wang zheng ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang tang) OR (tang tang)) min ((yuan yi) or (yuan li)) yang xi wang zheng ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang tang) OR (tang tang)) min ((yuan yi) or (yuan li)) yang xi wang zheng ;*.