Perhaps you should try some spelling variations:
wang yidan » wang yan
yang cindy » yang mind
sang minh » kang minah, anh minh, song min
yang jie » yang jin, yang di, yang jui
jeong mi » jeong _, jeong su, jeong 情
yan a » can a, yan _, man a
jan a » jane a, can a, jan m

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yidan ((yan a) OR (jan a)) chen ((((sang minh) or (yang cindy))) or (yang jie)) jeong mi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yidan ((yan a) OR (jan a)) chen ((((sang minh) OR (yang cindy))) OR (yang jie)) jeong mi ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yidan ((yan a) OR (jan a)) chen ((((sang minh) or (yang cindy))) or (yang jie)) jeong mi ;*".