Perhaps you should try some spelling variations:
wang yidan » wang yan
song minh » sang minh, song min, song ming
minh tong » minh cong, dinh tung, min hong
wang ban » wang yan, wang dan, wang yang
tong hui » wang hui
lu song » li song, kyu song, yun song
di lu » li lu, yi lu

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((wang yidan) or (wang ban)) di lu song minh tong hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((wang yidan) OR (wang ban)) di lu song minh tong hui ;*.