Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song ming
wang dan » wang yan, wang yidan, wang yang
wang ban » wang yan, wang yang, bang bang
song min » song ming, gong min, jong min
long du » long d, long do, long run
li lun » li lin, li jun, li lan
li lu » li ju, li l, li li

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang dan) or (wang ban)) yang ((li lu) or (li lun)) ((sang minh) OR (song min)) long du ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang dan) OR (wang ban)) yang ((li lu) OR (li lun)) ((sang minh) OR (song min)) long du ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang dan) or (wang ban)) yang ((li lu) or (li lun)) ((sang minh) OR (song min)) long du ;*".