Perhaps you should try some spelling variations:
douglas mair » douglas mary, douglas a, douglas m
last things » first things, smart things
yang ying » yang yang, huang ying, liang ying
yang jing » wang jing, yang jin, huang jing
things » thinks, thins
thing » think, thin
zeng » eng, feng, peng

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

• Performing a fuzzy search may retrieve terms with similar spellings: dan ((yang ying) OR (yang jing)) his ((last things) or (last thing)) zeng douglas mair ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dan ((yang ying) OR (yang jing)) his ((last things) OR (last thing)) zeng douglas mair ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dan ((yang ying) OR (yang jing)) his ((last things) or (last thing)) zeng douglas mair ;*".