Perhaps you should try some spelling variations:
douglas mair » douglas mary, douglas a, douglas m
things zeng » things zhang, things end, things using
douglas bin » douglas b, douglas john
wang yang » wang yan, wang liang, wang yanling
yang jing » wang jing, yang jin, huang jing
ai first » i first, mali first, 2 first
ii first » i first, 2 first, 3 first

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang jing ((ai first) or (ii first)) things zeng ((douglas bin) OR (douglas mair)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang jing ((ai first) OR (ii first)) things zeng ((douglas bin) OR (douglas mair)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang jing ((ai first) or (ii first)) things zeng ((douglas bin) OR (douglas mair)) ;".
• Adding a wildcard symbol may retrieve word variants: wang yang jing ((ai first) or (ii first)) things zeng ((douglas bin) OR (douglas mair)) ;*.