Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
dong yang » dong hoang, wang yang, yang yang
guang hua » wang hua, gang hu, guang eu
hua rene » hua ren, juan rene
tran thi » trang thu
yan thi » dang thi, nhan thi, phan thi
yan zhi » yan zi, wang zhi
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: dong yang guang hua rene ((((yan thi) OR (tran thi))) OR (yan zhi)) hong yu ;~.
• Adding a wildcard symbol may retrieve word variants: dong yang guang hua rene ((((yan thi) or (tran thi))) or (yan zhi)) hong yu ;*.