Perhaps you should try some spelling variations:
yiqian wang » yijiang wang, liqin wang
qian wang » qian rong, qian yan, yan wang
yang dali » yang di, bang dai, yang all
david ian » david a, david n
form der » formen der
form de » form des, form die, form e
ian hai » dang hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((qian wang) or (yiqian wang)) yang dali ((form de) OR (form der)) david ian hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((qian wang) OR (yiqian wang)) yang dali ((form de) OR (form der)) david ian hai ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((qian wang) or (yiqian wang)) yang dali ((form de) OR (form der)) david ian hai ;*".