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 » yan zhi, dang thi, nhan thi
hong yu » wong yue

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: dong yang guang hua rene ((yan thi) or (tran thi)) hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang guang hua rene ((yan thi) OR (tran thi)) hong yu ;.
• Adding a wildcard symbol may retrieve word variants: dong yang guang hua rene ((yan thi) or (tran thi)) hong yu ;*.