Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song ming
song min » song ming, gong min, jong min
long shu » cong shu, tong shui
long du » long d, long do, long run
yan yi » yang yi, tan yi, yan zi
yi hua » li hua, ya hua, yi hui
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan yi hua (rent or (rest or test)) ((sang minh) OR (song min)) ((long shu) or (long du)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan yi hua (rent OR (rest OR test)) ((sang minh) OR (song min)) ((long shu) OR (long du)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan yi hua (rent or (rest or test)) ((sang minh) OR (song min)) ((long shu) or (long du)) ;".
• Adding a wildcard symbol may retrieve word variants: wang yan yi hua (rent or (rest or test)) ((sang minh) OR (song min)) ((long shu) or (long du)) ;*.