Perhaps you should try some spelling variations:
juan meng » juan rene, jui meng, yuan ming
yang minh » yang mind, kang minah, anh minh
sang minh » kang minah, anh minh, song min
lang yan » wang yan, wang yang, zhang yan
4 juan » _ juan, v juan, y juan
yan 4 » yang 4, yan _, ban 4
cong » congo, long, hong

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan 4 juan meng ((yang minh) or (sang minh)) cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan 4 juan meng ((yang minh) OR (sang minh)) cong shu ;*.