Perhaps you should try some spelling variations:
ying system » yang system, buying system, typing system
zhang jing » zhang ming, zhang jin, zhang ping
yang jui » yang judy, yang di, yang xi
tan ying » fan ying, tan yang, tan yong
ran ying » fan ying, jin ying, gao ying
wai yan » wang yan, wei yang
yang yi » yang di, yang xi
ji ying » jin ying, li ying, hoi ying

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: ((wai yan) OR (((yang jui) OR (yang yi)))) zhang jing ((tan ying) OR (ran ying)) ji ying system ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wai yan) or (((yang jui) or (yang yi)))) zhang jing ((tan ying) OR (ran ying)) ji ying system ;~".
• Adding a wildcard symbol may retrieve word variants: ((wai yan) or (((yang jui) or (yang yi)))) zhang jing ((tan ying) OR (ran ying)) ji ying system ;*.