Perhaps you should try some spelling variations:
qin zheng » qian sheng, bin zhang
zhang xin » zhang jian, zhang ming, zhang fan
yan clan » das clan, yan guan, yan yuan
lin chun » lee chun, lin tun
tong shu » tong shui, cong shu, wong shiu
nan yan » nan ya, wang yan, qian yan
wang » wing, wan, lang

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 ((yan clan) OR (nan yan)) ((qin zheng) OR (((lin chun) OR (lin chih)))) zhang xin tong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan clan) or (nan yan)) ((qin zheng) or (((lin chun) OR (lin chih)))) zhang xin tong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan clan) or (nan yan)) ((qin zheng) or (((lin chun) OR (lin chih)))) zhang xin tong shu ;*.