Perhaps you should try some spelling variations:
chung kang » chung kay, chung tong
lens china » loans china, leases china
chan kang » chan eng, chan fong, chan jan
chen yang » chen rong
ren yang » ren yan, dan yang, pei yang
tin hong » tan hong, kia hong, thi hong
hong yu » wong yue

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