Perhaps you should try some spelling variations:
long trinh » long trip, long thanh
hong than » hong tan, long thanh, hong hai
ying hua » ming hua, wang hua, ying zhu
yang xi » yang di, yang yi, yang jui
hua ren » hua chen
yan tan » tan tan, yan clan, yan guan
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) OR (yang xi)) ying hua ren yan tan ((hong than) OR (long trinh)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang yan) or (yang xi)) ying hua ren yan tan ((hong than) or (long trinh)) ;*.