Perhaps you should try some spelling variations:
douglas john » douglas jones, douglas j, douglas o
things zeng » things zhang, things end, things using
douglas bin » douglas b, douglas mair
yan ling » yan liang, yang liang, yang jing
i last » _ last, 3 last, 4 last
a last » _ last, a las
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 ling ((i last) OR (a last)) things zeng ((douglas bin) or (douglas john)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ling ((i last) OR (a last)) things zeng ((douglas bin) OR (douglas john)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ling ((i last) OR (a last)) things zeng ((douglas bin) or (douglas john)) ;".
• Adding a wildcard symbol may retrieve word variants: wang yan ling ((i last) OR (a last)) things zeng ((douglas bin) or (douglas john)) ;*.