Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
sang minh » kang minah, anh minh, song min
kang min » kan min, tang min, kang minah
tong hui » wang hui
di lu » li lu
yi lu » yi xu, li lu
yi wu » yi xu

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang yang ((di lu) or (((yi lu) or (yi wu)))) ((kang min) or (sang minh)) tong hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yang ((di lu) OR (((yi lu) OR (yi wu)))) ((kang min) OR (sang minh)) tong hui ;.
• Adding a wildcard symbol may retrieve word variants: wang yang yang ((di lu) or (((yi lu) or (yi wu)))) ((kang min) or (sang minh)) tong hui ;*.