Perhaps you should try some spelling variations:
juan meng » juan rene, jui meng, yuan ming
lang yan » wang yan, wang yang, zhang yan
yan minh » tuan minh, sang minh, yang mind
yang jin » yang jie, yang jun, ying jin
cong van » congo can, duong van, cong sun
zi juan » zi yuan
yan zi » yan zhi, yuan zi, ban zi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan zi juan meng ((yan minh) OR (yang jin)) cong van ;~.
• Adding a wildcard symbol may retrieve word variants: lang yan zi juan meng ((yan minh) or (yang jin)) cong van ;*.