Perhaps you should try some spelling variations:
taizong tang » tang tang
yang taizong » yan hairong
yang yang » wang yang, wang yan
chen yang » chen rong
yuan kai » yuan kang, yuan fei, tan kai
yang yao » wang yan, yang yi, yang fan
tang hai » dang hai, shang hai, tang li
a chen » ta chen, _ chen, n chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang ((yuan kai) or (((yang yao) OR (yang yang)))) a chen yang taizong tang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang ((yuan kai) OR (((yang yao) OR (yang yang)))) a chen yang taizong tang hai ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang ((yuan kai) or (((yang yao) OR (yang yang)))) a chen yang taizong tang hai ;*".