Perhaps you should try some spelling variations:
reformen beim » reformen im, reformen teil, reformen der
reformen bei » reformen teil, reformen der, reformen des
yang liang » wang liang, yang yang, peng liang
yan liang » wang liang, you liang, yan wang
david k » david a, david _
k hai » k hari, _ hai, k lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan ((yan liang) or (yang liang)) iii ((reformen beim) OR (reformen bei)) david k hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan ((yan liang) OR (yang liang)) iii ((reformen beim) OR (reformen bei)) david k hai ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((yan liang) or (yang liang)) iii ((reformen beim) OR (reformen bei)) david k hai ;*".