Perhaps you should try some spelling variations:
chung kang » chung kay, chung tong
lens china » loans china, leases china
chan kang » chan fong, chan jan, chan ming
china ren » china loren, china real, china reza
chan eng » chan fong, chan ming, han en
ren yang » ren yan, chen yang, dan yang
yang tin » yang jin, yang lin, yang jing
tin wang » ping wang, qian wang, tin hong
wang yue » wong yue, wang hua, wang yan

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: ((chan eng) OR (((chan kang) OR (chung kang)))) lens china ren yang tin wang yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((chan eng) or (((chan kang) OR (chung kang)))) lens china ren yang tin wang yue ;~".
• Adding a wildcard symbol may retrieve word variants: ((chan eng) or (((chan kang) OR (chung kang)))) lens china ren yang tin wang yue ;*.