Perhaps you should try some spelling variations:
reformen der » formen der, reform der
david dang » david ian, david mant, david ng
qiang niu » qiang li
der david » de david, dyker david, dror david
dang hari » dang hai
wan you » want you, warn you, can you
qian yi » qian yan

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 you ((qian yi) OR (qiang niu)) reformen der david dang hari ;~.
• Adding a wildcard symbol may retrieve word variants: wan you ((qian yi) or (qiang niu)) reformen der david dang hari ;*.