Perhaps you should try some spelling variations:
wang tang » wang yang, wang liang, wang yan
tang tang » taizong tang
fang yuan » wang yuhan, wang yan, meng yuan
yuan li » yuan lin, guan li, yuan zi
li yang » liu yang, li ying, li gang
yang xi » yang di, yang yi, yang jui
xi fang » xia fang, xi kang, cai fang

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