Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
yang july » yang judy, yang jui
yang jun » yang jui, pang jun, yang jin
jia sang » jia fang, jia zhang, kil sang
henk van » henk jan, hans van
qian yi » qian yan
yang yi » yang xi, yang jui

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: qian yi ((((yang yi) OR (yang di))) OR (((yang july) OR (yang jun)))) jia sang minh henk van ;~.
• Adding a wildcard symbol may retrieve word variants: qian yi ((((yang yi) or (yang di))) or (((yang july) or (yang jun)))) jia sang minh henk van ;*.