Perhaps you should try some spelling variations:
daizong » daizhong, daikong, daisong
dairong » bairong, kairong, airong
hairong » hailong, bairong, haidong
haiyong » hailong, haiyang, haiying
tang » gang, tag, tan

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: emperor (daizong OR (dairong OR (hairong OR haiyong))) of tang.
• The words AND, OR and NOT may confuse the search; try adding quotes: "emperor (daizong or (dairong or (hairong OR haiyong))) of tang".
• Adding a wildcard symbol may retrieve word variants: emperor (daizong or (dairong or (hairong OR haiyong))) of tang*.