Perhaps you should try some spelling variations:
douglas john » douglas jones, douglas j, douglas o
last things » last thing, first things
wang wang » wang yang, wang liang, wang yan
douglas b » douglas f, douglas w, douglas a
wang lin » wang li, wang qin, yang lin
lin li » ling li, lin yi, yin li
smart » start

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang wang lin li ((last things) or (smart things)) zeng ((douglas b) or (douglas john)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang wang lin li ((last things) OR (smart things)) zeng ((douglas b) OR (douglas john)) ;.
• Adding a wildcard symbol may retrieve word variants: wang wang lin li ((last things) or (smart things)) zeng ((douglas b) or (douglas john)) ;*.