Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
juan rene » juan meng, juan rana
hua rene » hua ren
yang lin » yang jin, wang lin, yang li
tang min » chang min, sang minh, yang mind
wong yue » wang yue, hong yu

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) or (yang yang)) ya ((hua rene) OR (juan rene)) ((yang lin) or (tang min)) wong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yang) OR (yang yang)) ya ((hua rene) OR (juan rene)) ((yang lin) OR (tang min)) wong yue ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) or (yang yang)) ya ((hua rene) OR (juan rene)) ((yang lin) or (tang min)) wong yue ;".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (yang yang)) ya ((hua rene) OR (juan rene)) ((yang lin) or (tang min)) wong yue ;*.