Perhaps you should try some spelling variations:
douglas mair » douglas mary, douglas a, douglas m
first thins » first things, first thing, first ethics
daun yang » dan yang, tan yang, un yang
yan his » man his, yan risk
last » east, past, list
thing » things, think, thin
zeng » eng, feng, peng

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: ((daun yang) OR (du yang)) yan his ((first thins) OR (last thing)) zeng douglas mair ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((daun yang) OR (du yang)) yan his ((first thins) or (last thing)) zeng douglas mair ;~".
• Adding a wildcard symbol may retrieve word variants: ((daun yang) OR (du yang)) yan his ((first thins) or (last thing)) zeng douglas mair ;*.