Perhaps you should try some spelling variations:
douglas john » douglas jones, douglas j, douglas o
things zeng » things zhang, things end, things using
wang yang » wang yan, wang liang, wang yanling
douglas b » douglas f, douglas w, douglas a
yang yin » yang yi, yang jin, yang lin
li smart » la smart, live smart, die smart
yin li » yin lei, yin lie, yin la

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 yin li smart things zeng ((douglas b) or (douglas john)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yin li smart things zeng ((douglas b) OR (douglas john)) ;.
• Adding a wildcard symbol may retrieve word variants: wang yang yin li smart things zeng ((douglas b) or (douglas john)) ;*.