Perhaps you should try some spelling variations:
juan rene » juan meng
juan rana » juan danza, juan lara
sang minh » kang minah, anh minh, song min
yan yong » yan cong, tan yong, wang yong
tang min » chang min, yang mind, tang li
wong yue » wang yue, hong yu
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan yong ((juan rene) OR (juan rana)) ((tang min) or (sang minh)) wong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan yong ((juan rene) OR (juan rana)) ((tang min) OR (sang minh)) wong yue ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan yong ((juan rene) OR (juan rana)) ((tang min) or (sang minh)) wong yue ;*".