Perhaps you should try some spelling variations:
david ian » david a, david n
wan wang » wen wang, wang yang, qian wang
yan wang » yuan wang, yang yang, qian wang
yan zili » yang zili, yan zhi, yan zi
ian hai » dang hai
form 2 » form _, form a, form 3
form i » form _, form a, reform i

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: ((wan wang) OR (yan wang)) yan zili ((form 2) OR (form i)) david ian hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan wang) OR (yan wang)) yan zili ((form 2) or (form i)) david ian hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((wan wang) OR (yan wang)) yan zili ((form 2) or (form i)) david ian hai ;*.