Perhaps you should try some spelling variations:
hua irene » hua ren
sang minh » kang minah, anh minh, song ming
song min » song ming, gong min, jong min
cong seo » hong seo, cong shu, cong sun
yang yi » yang di, yang xi, yang jui
yan yi » tan yi, yan zi, yin yi
a chen » ta chen, _ chen, n chen
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) or (yang yi)) ((hua irene) or (a chen)) ((sang minh) OR (song min)) cong seo ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan yi) OR (yang yi)) ((hua irene) OR (a chen)) ((sang minh) OR (song min)) cong seo ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yi) or (yang yi)) ((hua irene) or (a chen)) ((sang minh) OR (song min)) cong seo ;".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yi) or (yang yi)) ((hua irene) or (a chen)) ((sang minh) OR (song min)) cong seo ;*.