Perhaps you should try some spelling variations:
juan rene » juan meng, juan rana
yang minh » yang mind, kang minah, anh minh
sang minh » kang minah, anh minh, song min
yang y.c » yang yao, yang 4.3, yang yue
yang yi » yang di, yang jui
yang xi » yang di, yang jui
cong » congo, long, hong

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: dong ((((yang y.c) OR (yang yi))) OR (yang xi)) juan rene ((yang minh) OR (sang minh)) cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((((yang y.c) or (yang yi))) or (yang xi)) juan rene ((yang minh) OR (sang minh)) cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: dong ((((yang y.c) or (yang yi))) or (yang xi)) juan rene ((yang minh) OR (sang minh)) cong shu ;*.