Perhaps you should try some spelling variations:
tang zheng » wang zheng, fang sheng, fang zhen
zheng yuan » zheng quan, zheng xuan, cheng guan
tang tang » taizong tang
yuan ming » yuan ting, kian ming, tuan minh
yang dali » yang di, yang all, yang li
yang cai » yong cai, yang chik, yang di
bang dai » zhang dai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tang tang zheng yuan ming ((yang cai) or (((yang dali) OR (bang dai)))) fang (sheng or cheng) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tang tang zheng yuan ming ((yang cai) OR (((yang dali) OR (bang dai)))) fang (sheng OR cheng) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tang tang zheng yuan ming ((yang cai) or (((yang dali) OR (bang dai)))) fang (sheng or cheng) ;*".