Perhaps you should try some spelling variations:
david hong » david ng
bank david » black david, mark david, bank ravi
dog study » dem study, did study, emg study
arg study » emg study, ieg study, meg study
die bank » die banken
hong ghi » zhong zhi, hong g, hong hai
wang » lang

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: ((wang OR wing) OR wan) yao ((arg study) OR (dog study)) die bank david hong ghi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang OR wing) or wan) yao ((arg study) or (dog study)) die bank david hong ghi ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang OR wing) or wan) yao ((arg study) or (dog study)) die bank david hong ghi ;*.