Perhaps you should try some spelling variations:
formen beim » reformen beim, formen im, forschen beim
zhi formen » zwei formen, ii formen, iii formen
beim david » kim david
yang yang » wang yang, wang yan
wan yang » wang yang, dan yang, tan yang
yang zhi » wang zhi, yan zhi, liang zhi
hong hai » shang hai, zhong tai, dang hai
ng 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: wan yang yang zhi formen beim david ((ng hai) or (hong hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yang yang zhi formen beim david ((ng hai) OR (hong hai)) ;*.