Perhaps you should try some spelling variations:
ying system » yang system, buying system, typing system
wing wang » ping wang, hong wang, wing ian
wei wang » wei yang, wei shang, wei qiang
wen wang » chen wang, weng fang, men want
yang xi » yang jui
yang yi » yang jui
yi ying » li ying, yi jing, yi ning

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: ((wei wang) OR (((yang di) OR (yang xi)))) zhang ((wing wang) OR (wen wang)) yang yi ying system ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wei wang) or (((yang di) or (yang xi)))) zhang ((wing wang) OR (wen wang)) yang yi ying system ;~".
• Adding a wildcard symbol may retrieve word variants: ((wei wang) or (((yang di) or (yang xi)))) zhang ((wing wang) OR (wen wang)) yang yi ying system ;*.