Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song ming
chai dan » chai onn, chai tam, shi dan
song min » song ming, gong min, jong min
hong hai » shang hai, zhong tai, dang hai
chang ha » chang mae
ka chai » ka chuan, kim chai
yan ka » yang ka, yuan kai
wang » wing, wan, lang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ka chai dan ((sang minh) OR (song min)) ((hong hai) OR (chang ha)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ka chai dan ((sang minh) OR (song min)) ((hong hai) or (chang ha)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan ka chai dan ((sang minh) OR (song min)) ((hong hai) or (chang ha)) ;*.