Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
juan meng » juan rene, jui meng, yuan ming
hua rene » hua ren, juan rene
ten minh » tuan minh, ten high
thi minh » chi minh
yang ka » yang fan, yang yao
rong yu » hong yu, rong su, 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 ka ((hua rene) or (juan meng)) ((ten minh) or (thi minh)) rong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang ka ((hua rene) OR (juan meng)) ((ten minh) OR (thi minh)) rong yu ;.
• Adding a wildcard symbol may retrieve word variants: dong yang ka ((hua rene) or (juan meng)) ((ten minh) or (thi minh)) rong yu ;*.