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