Perhaps you should try some spelling variations:
juan meng » juan rene, jui meng, yuan ming
sang minh » kang minah, song min, song ming
yan minh » tuan minh, yang mind, yuan ming
cong van » congo can, duong van, cong sun
y juan » _ juan, v juan
yan y » yang y, yan _, yan 4
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 y juan meng ((yan minh) or (((sang minh) OR (anh minh)))) cong van ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan y juan meng ((yan minh) OR (((sang minh) OR (anh minh)))) cong van ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan y juan meng ((yan minh) or (((sang minh) OR (anh minh)))) cong van ;*".